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Finding the Fourth Proportional to 99,911.52, 137,873.57 and 54,587.39

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Solution

The fourth proportional to 99,911.52, 137,873.57 and 54,587.39 is: 75,328.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,911.52 : 137,873.57 = 54,587.39 : x
  2. Step 2: Convert to fraction form
    99,911.52/137,873.57 = 54,587.39/x
  3. Step 3: Cross multiply
    99,911.52x = 137,873.57 × 54,587.39
  4. Step 4: Simplify right side
    99,911.52x = 7,526,157,373.98
  5. Step 5: Solve for x
    x = 7,526,157,373.98/99,911.52
  6. Step 6: Final answer
    x = 75,328.22

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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.