Home / 85,543,231.20-128,314,846.80-28,037,378.40

Finding the Fourth Proportional to 85,543,231.20, 128,314,846.80 and 28,037,378.40

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Solution

The fourth proportional to 85,543,231.20, 128,314,846.80 and 28,037,378.40 is: 42,056,067.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,543,231.20 : 128,314,846.80 = 28,037,378.40 : x
  2. Step 2: Convert to fraction form
    85,543,231.20/128,314,846.80 = 28,037,378.40/x
  3. Step 3: Cross multiply
    85,543,231.20x = 128,314,846.80 × 28,037,378.40
  4. Step 4: Simplify right side
    85,543,231.20x = 3,597,611,914,069,629
  5. Step 5: Solve for x
    x = 3,597,611,914,069,629/85,543,231.20
  6. Step 6: Final answer
    x = 42,056,067.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.