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Finding the Fourth Proportional to 99,502.03, 137,404.02 and 63,215.20

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Solution

The fourth proportional to 99,502.03, 137,404.02 and 63,215.20 is: 87,294.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,502.03 : 137,404.02 = 63,215.20 : x
  2. Step 2: Convert to fraction form
    99,502.03/137,404.02 = 63,215.20/x
  3. Step 3: Cross multiply
    99,502.03x = 137,404.02 × 63,215.20
  4. Step 4: Simplify right side
    99,502.03x = 8,686,022,605.10
  5. Step 5: Solve for x
    x = 8,686,022,605.10/99,502.03
  6. Step 6: Final answer
    x = 87,294.93

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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.