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Finding the Fourth Proportional to 131,591.88, 181,614.10 and 74,990.28

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Solution

The fourth proportional to 131,591.88, 181,614.10 and 74,990.28 is: 103,496.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,591.88 : 181,614.10 = 74,990.28 : x
  2. Step 2: Convert to fraction form
    131,591.88/181,614.10 = 74,990.28/x
  3. Step 3: Cross multiply
    131,591.88x = 181,614.10 × 74,990.28
  4. Step 4: Simplify right side
    131,591.88x = 13,619,292,210.95
  5. Step 5: Solve for x
    x = 13,619,292,210.95/131,591.88
  6. Step 6: Final answer
    x = 103,496.45

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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.