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Finding the Fourth Proportional to 138,889.91, 208,347.17 and 39,050.97

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Solution

The fourth proportional to 138,889.91, 208,347.17 and 39,050.97 is: 58,579.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,889.91 : 208,347.17 = 39,050.97 : x
  2. Step 2: Convert to fraction form
    138,889.91/208,347.17 = 39,050.97/x
  3. Step 3: Cross multiply
    138,889.91x = 208,347.17 × 39,050.97
  4. Step 4: Simplify right side
    138,889.91x = 8,136,158,890.00
  5. Step 5: Solve for x
    x = 8,136,158,890.00/138,889.91
  6. Step 6: Final answer
    x = 58,579.92

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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.