Home / 138,718.97-191,432.83-78,292.16

Finding the Fourth Proportional to 138,718.97, 191,432.83 and 78,292.16

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Solution

The fourth proportional to 138,718.97, 191,432.83 and 78,292.16 is: 108,043.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,718.97 : 191,432.83 = 78,292.16 : x
  2. Step 2: Convert to fraction form
    138,718.97/191,432.83 = 78,292.16/x
  3. Step 3: Cross multiply
    138,718.97x = 191,432.83 × 78,292.16
  4. Step 4: Simplify right side
    138,718.97x = 14,987,689,755.61
  5. Step 5: Solve for x
    x = 14,987,689,755.61/138,718.97
  6. Step 6: Final answer
    x = 108,043.55

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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.