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Finding the Fourth Proportional to 100,296.68, 138,423.60 and 62,068.54

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Solution

The fourth proportional to 100,296.68, 138,423.60 and 62,068.54 is: 85,663.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,296.68 : 138,423.60 = 62,068.54 : x
  2. Step 2: Convert to fraction form
    100,296.68/138,423.60 = 62,068.54/x
  3. Step 3: Cross multiply
    100,296.68x = 138,423.60 × 62,068.54
  4. Step 4: Simplify right side
    100,296.68x = 8,591,750,407.49
  5. Step 5: Solve for x
    x = 8,591,750,407.49/100,296.68
  6. Step 6: Final answer
    x = 85,663.36

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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.