Home / 138,393.06-191,013.51-90,618.66

Finding the Fourth Proportional to 138,393.06, 191,013.51 and 90,618.66

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Solution

The fourth proportional to 138,393.06, 191,013.51 and 90,618.66 is: 125,074.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,393.06 : 191,013.51 = 90,618.66 : x
  2. Step 2: Convert to fraction form
    138,393.06/191,013.51 = 90,618.66/x
  3. Step 3: Cross multiply
    138,393.06x = 191,013.51 × 90,618.66
  4. Step 4: Simplify right side
    138,393.06x = 17,309,388,318.10
  5. Step 5: Solve for x
    x = 17,309,388,318.10/138,393.06
  6. Step 6: Final answer
    x = 125,074.11

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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.