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Finding the Fourth Proportional to 138,461.67, 207,554.49 and 58,519.80

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Solution

The fourth proportional to 138,461.67, 207,554.49 and 58,519.80 is: 87,721.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,461.67 : 207,554.49 = 58,519.80 : x
  2. Step 2: Convert to fraction form
    138,461.67/207,554.49 = 58,519.80/x
  3. Step 3: Cross multiply
    138,461.67x = 207,554.49 × 58,519.80
  4. Step 4: Simplify right side
    138,461.67x = 12,146,047,243.90
  5. Step 5: Solve for x
    x = 12,146,047,243.90/138,461.67
  6. Step 6: Final answer
    x = 87,721.37

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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.