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Finding the Fourth Proportional to 100,296.93, 138,423.95 and 62,068.79

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Solution

The fourth proportional to 100,296.93, 138,423.95 and 62,068.79 is: 85,663.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,296.93 : 138,423.95 = 62,068.79 : x
  2. Step 2: Convert to fraction form
    100,296.93/138,423.95 = 62,068.79/x
  3. Step 3: Cross multiply
    100,296.93x = 138,423.95 × 62,068.79
  4. Step 4: Simplify right side
    100,296.93x = 8,591,807,083.52
  5. Step 5: Solve for x
    x = 8,591,807,083.52/100,296.93
  6. Step 6: Final answer
    x = 85,663.71

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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.