Home / 85,999.20-128,998.80-59,427.15

Finding the Fourth Proportional to 85,999.20, 128,998.80 and 59,427.15

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Solution

The fourth proportional to 85,999.20, 128,998.80 and 59,427.15 is: 89,140.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,999.20 : 128,998.80 = 59,427.15 : x
  2. Step 2: Convert to fraction form
    85,999.20/128,998.80 = 59,427.15/x
  3. Step 3: Cross multiply
    85,999.20x = 128,998.80 × 59,427.15
  4. Step 4: Simplify right side
    85,999.20x = 7,666,031,037.42
  5. Step 5: Solve for x
    x = 7,666,031,037.42/85,999.20
  6. Step 6: Final answer
    x = 89,140.73

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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.