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Finding the Fourth Proportional to 85,074.60, 127,611.90 and 83,106.30

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Solution

The fourth proportional to 85,074.60, 127,611.90 and 83,106.30 is: 124,659.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,074.60 : 127,611.90 = 83,106.30 : x
  2. Step 2: Convert to fraction form
    85,074.60/127,611.90 = 83,106.30/x
  3. Step 3: Cross multiply
    85,074.60x = 127,611.90 × 83,106.30
  4. Step 4: Simplify right side
    85,074.60x = 10,605,352,844.97
  5. Step 5: Solve for x
    x = 10,605,352,844.97/85,074.60
  6. Step 6: Final answer
    x = 124,659.45

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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.