Home / 138,712.16-207,901.92-79,588.64

Finding the Fourth Proportional to 138,712.16, 207,901.92 and 79,588.64

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Solution

The fourth proportional to 138,712.16, 207,901.92 and 79,588.64 is: 119,287.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,712.16 : 207,901.92 = 79,588.64 : x
  2. Step 2: Convert to fraction form
    138,712.16/207,901.92 = 79,588.64/x
  3. Step 3: Cross multiply
    138,712.16x = 207,901.92 × 79,588.64
  4. Step 4: Simplify right side
    138,712.16x = 16,546,631,066.19
  5. Step 5: Solve for x
    x = 16,546,631,066.19/138,712.16
  6. Step 6: Final answer
    x = 119,287.53

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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.