Home / 138,252.89-207,047.14-78,908.65

Finding the Fourth Proportional to 138,252.89, 207,047.14 and 78,908.65

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Solution

The fourth proportional to 138,252.89, 207,047.14 and 78,908.65 is: 118,173.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,252.89 : 207,047.14 = 78,908.65 : x
  2. Step 2: Convert to fraction form
    138,252.89/207,047.14 = 78,908.65/x
  3. Step 3: Cross multiply
    138,252.89x = 207,047.14 × 78,908.65
  4. Step 4: Simplify right side
    138,252.89x = 16,337,809,588.87
  5. Step 5: Solve for x
    x = 16,337,809,588.87/138,252.89
  6. Step 6: Final answer
    x = 118,173.37

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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.