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Finding the Fourth Proportional to 99,640.70, 137,426.40 and 63,834.04

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Solution

The fourth proportional to 99,640.70, 137,426.40 and 63,834.04 is: 88,041.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,640.70 : 137,426.40 = 63,834.04 : x
  2. Step 2: Convert to fraction form
    99,640.70/137,426.40 = 63,834.04/x
  3. Step 3: Cross multiply
    99,640.70x = 137,426.40 × 63,834.04
  4. Step 4: Simplify right side
    99,640.70x = 8,772,481,971.09
  5. Step 5: Solve for x
    x = 8,772,481,971.09/99,640.70
  6. Step 6: Final answer
    x = 88,041.16

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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.