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Finding the Fourth Proportional to 85,432.59, 128,024.28 and 60,459.08

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Solution

The fourth proportional to 85,432.59, 128,024.28 and 60,459.08 is: 90,600.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,432.59 : 128,024.28 = 60,459.08 : x
  2. Step 2: Convert to fraction form
    85,432.59/128,024.28 = 60,459.08/x
  3. Step 3: Cross multiply
    85,432.59x = 128,024.28 × 60,459.08
  4. Step 4: Simplify right side
    85,432.59x = 7,740,229,546.34
  5. Step 5: Solve for x
    x = 7,740,229,546.34/85,432.59
  6. Step 6: Final answer
    x = 90,600.43

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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.