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Finding the Fourth Proportional to 91,929.68, 137,626.68 and 68,341.76

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Solution

The fourth proportional to 91,929.68, 137,626.68 and 68,341.76 is: 102,313.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,929.68 : 137,626.68 = 68,341.76 : x
  2. Step 2: Convert to fraction form
    91,929.68/137,626.68 = 68,341.76/x
  3. Step 3: Cross multiply
    91,929.68x = 137,626.68 × 68,341.76
  4. Step 4: Simplify right side
    91,929.68x = 9,405,649,534.16
  5. Step 5: Solve for x
    x = 9,405,649,534.16/91,929.68
  6. Step 6: Final answer
    x = 102,313.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.