Home / 85,701.28-128,330.40-59,129.20

Finding the Fourth Proportional to 85,701.28, 128,330.40 and 59,129.20

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Solution

The fourth proportional to 85,701.28, 128,330.40 and 59,129.20 is: 88,540.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,701.28 : 128,330.40 = 59,129.20 : x
  2. Step 2: Convert to fraction form
    85,701.28/128,330.40 = 59,129.20/x
  3. Step 3: Cross multiply
    85,701.28x = 128,330.40 × 59,129.20
  4. Step 4: Simplify right side
    85,701.28x = 7,588,073,887.68
  5. Step 5: Solve for x
    x = 7,588,073,887.68/85,701.28
  6. Step 6: Final answer
    x = 88,540.96

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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.