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Finding the Fourth Proportional to 99,703.92, 137,513.64 and 63,897.28

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Solution

The fourth proportional to 99,703.92, 137,513.64 and 63,897.28 is: 88,128.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,703.92 : 137,513.64 = 63,897.28 : x
  2. Step 2: Convert to fraction form
    99,703.92/137,513.64 = 63,897.28/x
  3. Step 3: Cross multiply
    99,703.92x = 137,513.64 × 63,897.28
  4. Step 4: Simplify right side
    99,703.92x = 8,786,747,558.90
  5. Step 5: Solve for x
    x = 8,786,747,558.90/99,703.92
  6. Step 6: Final answer
    x = 88,128.41

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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.