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Finding the Fourth Proportional to 138,889.70, 191,668.08 and 75,227.50

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Solution

The fourth proportional to 138,889.70, 191,668.08 and 75,227.50 is: 103,814.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,889.70 : 191,668.08 = 75,227.50 : x
  2. Step 2: Convert to fraction form
    138,889.70/191,668.08 = 75,227.50/x
  3. Step 3: Cross multiply
    138,889.70x = 191,668.08 × 75,227.50
  4. Step 4: Simplify right side
    138,889.70x = 14,418,710,488.20
  5. Step 5: Solve for x
    x = 14,418,710,488.20/138,889.70
  6. Step 6: Final answer
    x = 103,814.11

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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.