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Finding the Fourth Proportional to 138,292.47, 207,392.49 and 54,030.78

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Solution

The fourth proportional to 138,292.47, 207,392.49 and 54,030.78 is: 81,028.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,292.47 : 207,392.49 = 54,030.78 : x
  2. Step 2: Convert to fraction form
    138,292.47/207,392.49 = 54,030.78/x
  3. Step 3: Cross multiply
    138,292.47x = 207,392.49 × 54,030.78
  4. Step 4: Simplify right side
    138,292.47x = 11,205,578,000.84
  5. Step 5: Solve for x
    x = 11,205,578,000.84/138,292.47
  6. Step 6: Final answer
    x = 81,028.11

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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.