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Finding the Fourth Proportional to 351,396.51, 527,311.65 and 138,127.11

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Solution

The fourth proportional to 351,396.51, 527,311.65 and 138,127.11 is: 207,275.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,396.51 : 527,311.65 = 138,127.11 : x
  2. Step 2: Convert to fraction form
    351,396.51/527,311.65 = 138,127.11/x
  3. Step 3: Cross multiply
    351,396.51x = 527,311.65 × 138,127.11
  4. Step 4: Simplify right side
    351,396.51x = 72,836,034,283.83
  5. Step 5: Solve for x
    x = 72,836,034,283.83/351,396.51
  6. Step 6: Final answer
    x = 207,275.92

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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.