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Finding the Fourth Proportional to 100,787.75, 139,102.40 and 60,523.71

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Solution

The fourth proportional to 100,787.75, 139,102.40 and 60,523.71 is: 83,531.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,787.75 : 139,102.40 = 60,523.71 : x
  2. Step 2: Convert to fraction form
    100,787.75/139,102.40 = 60,523.71/x
  3. Step 3: Cross multiply
    100,787.75x = 139,102.40 × 60,523.71
  4. Step 4: Simplify right side
    100,787.75x = 8,418,993,242.25
  5. Step 5: Solve for x
    x = 8,418,993,242.25/100,787.75
  6. Step 6: Final answer
    x = 83,531.91

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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.