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Finding the Fourth Proportional to 138,937.88, 191,733.08 and 75,275.53

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Solution

The fourth proportional to 138,937.88, 191,733.08 and 75,275.53 is: 103,879.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,937.88 : 191,733.08 = 75,275.53 : x
  2. Step 2: Convert to fraction form
    138,937.88/191,733.08 = 75,275.53/x
  3. Step 3: Cross multiply
    138,937.88x = 191,733.08 × 75,275.53
  4. Step 4: Simplify right side
    138,937.88x = 14,432,808,359.82
  5. Step 5: Solve for x
    x = 14,432,808,359.82/138,937.88
  6. Step 6: Final answer
    x = 103,879.58

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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.