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Finding the Fourth Proportional to 99,605.54, 137,451.25 and 56,584.90

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Solution

The fourth proportional to 99,605.54, 137,451.25 and 56,584.90 is: 78,084.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,605.54 : 137,451.25 = 56,584.90 : x
  2. Step 2: Convert to fraction form
    99,605.54/137,451.25 = 56,584.90/x
  3. Step 3: Cross multiply
    99,605.54x = 137,451.25 × 56,584.90
  4. Step 4: Simplify right side
    99,605.54x = 7,777,664,751.03
  5. Step 5: Solve for x
    x = 7,777,664,751.03/99,605.54
  6. Step 6: Final answer
    x = 78,084.66

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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.