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Finding the Fourth Proportional to 139,732.40, 209,186.76 and 92,260.40

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Solution

The fourth proportional to 139,732.40, 209,186.76 and 92,260.40 is: 138,118.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,732.40 : 209,186.76 = 92,260.40 : x
  2. Step 2: Convert to fraction form
    139,732.40/209,186.76 = 92,260.40/x
  3. Step 3: Cross multiply
    139,732.40x = 209,186.76 × 92,260.40
  4. Step 4: Simplify right side
    139,732.40x = 19,299,654,152.30
  5. Step 5: Solve for x
    x = 19,299,654,152.30/139,732.40
  6. Step 6: Final answer
    x = 138,118.68

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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.