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Finding the Fourth Proportional to 89,010.30, 133,515.45 and 85,899.90

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Solution

The fourth proportional to 89,010.30, 133,515.45 and 85,899.90 is: 128,849.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,010.30 : 133,515.45 = 85,899.90 : x
  2. Step 2: Convert to fraction form
    89,010.30/133,515.45 = 85,899.90/x
  3. Step 3: Cross multiply
    89,010.30x = 133,515.45 × 85,899.90
  4. Step 4: Simplify right side
    89,010.30x = 11,468,963,803.46
  5. Step 5: Solve for x
    x = 11,468,963,803.46/89,010.30
  6. Step 6: Final answer
    x = 128,849.85

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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.