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Finding the Fourth Proportional to 89,938.80, 134,908.20 and 75,285.90

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Solution

The fourth proportional to 89,938.80, 134,908.20 and 75,285.90 is: 112,928.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,938.80 : 134,908.20 = 75,285.90 : x
  2. Step 2: Convert to fraction form
    89,938.80/134,908.20 = 75,285.90/x
  3. Step 3: Cross multiply
    89,938.80x = 134,908.20 × 75,285.90
  4. Step 4: Simplify right side
    89,938.80x = 10,156,685,254.38
  5. Step 5: Solve for x
    x = 10,156,685,254.38/89,938.80
  6. Step 6: Final answer
    x = 112,928.85

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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.