Home / 138,546.90-191,184.17-90,717.21

Finding the Fourth Proportional to 138,546.90, 191,184.17 and 90,717.21

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Solution

The fourth proportional to 138,546.90, 191,184.17 and 90,717.21 is: 125,182.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,546.90 : 191,184.17 = 90,717.21 : x
  2. Step 2: Convert to fraction form
    138,546.90/191,184.17 = 90,717.21/x
  3. Step 3: Cross multiply
    138,546.90x = 191,184.17 × 90,717.21
  4. Step 4: Simplify right side
    138,546.90x = 17,343,694,044.98
  5. Step 5: Solve for x
    x = 17,343,694,044.98/138,546.90
  6. Step 6: Final answer
    x = 125,182.84

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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.