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Finding the Fourth Proportional to 100,888.39, 139,179.18 and 65,089.90

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Solution

The fourth proportional to 100,888.39, 139,179.18 and 65,089.90 is: 89,793.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,888.39 : 139,179.18 = 65,089.90 : x
  2. Step 2: Convert to fraction form
    100,888.39/139,179.18 = 65,089.90/x
  3. Step 3: Cross multiply
    100,888.39x = 139,179.18 × 65,089.90
  4. Step 4: Simplify right side
    100,888.39x = 9,059,158,908.28
  5. Step 5: Solve for x
    x = 9,059,158,908.28/100,888.39
  6. Step 6: Final answer
    x = 89,793.87

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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.