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Finding the Fourth Proportional to 138,935.04, 191,729.88 and 75,273.90

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Solution

The fourth proportional to 138,935.04, 191,729.88 and 75,273.90 is: 103,877.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,935.04 : 191,729.88 = 75,273.90 : x
  2. Step 2: Convert to fraction form
    138,935.04/191,729.88 = 75,273.90/x
  3. Step 3: Cross multiply
    138,935.04x = 191,729.88 × 75,273.90
  4. Step 4: Simplify right side
    138,935.04x = 14,432,255,814.13
  5. Step 5: Solve for x
    x = 14,432,255,814.13/138,935.04
  6. Step 6: Final answer
    x = 103,877.72

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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.