Home / 138,717.97-191,431.45-78,291.16

Finding the Fourth Proportional to 138,717.97, 191,431.45 and 78,291.16

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Solution

The fourth proportional to 138,717.97, 191,431.45 and 78,291.16 is: 108,042.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,717.97 : 191,431.45 = 78,291.16 : x
  2. Step 2: Convert to fraction form
    138,717.97/191,431.45 = 78,291.16/x
  3. Step 3: Cross multiply
    138,717.97x = 191,431.45 × 78,291.16
  4. Step 4: Simplify right side
    138,717.97x = 14,987,389,900.27
  5. Step 5: Solve for x
    x = 14,987,389,900.27/138,717.97
  6. Step 6: Final answer
    x = 108,042.17

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1.5x scale

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.