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Finding the Fourth Proportional to 138,354.03, 207,418.95 and 58,340.21

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Solution

The fourth proportional to 138,354.03, 207,418.95 and 58,340.21 is: 87,463.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,354.03 : 207,418.95 = 58,340.21 : x
  2. Step 2: Convert to fraction form
    138,354.03/207,418.95 = 58,340.21/x
  3. Step 3: Cross multiply
    138,354.03x = 207,418.95 × 58,340.21
  4. Step 4: Simplify right side
    138,354.03x = 12,100,864,063.88
  5. Step 5: Solve for x
    x = 12,100,864,063.88/138,354.03
  6. Step 6: Final answer
    x = 87,463.04

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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.