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Finding the Fourth Proportional to 123,503.70, 170,432.89 and 69,787.56

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Solution

The fourth proportional to 123,503.70, 170,432.89 and 69,787.56 is: 96,305.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,503.70 : 170,432.89 = 69,787.56 : x
  2. Step 2: Convert to fraction form
    123,503.70/170,432.89 = 69,787.56/x
  3. Step 3: Cross multiply
    123,503.70x = 170,432.89 × 69,787.56
  4. Step 4: Simplify right side
    123,503.70x = 11,894,096,001.50
  5. Step 5: Solve for x
    x = 11,894,096,001.50/123,503.70
  6. Step 6: Final answer
    x = 96,305.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.