Home / 129,781.48-179,094.54-72,422.32

Finding the Fourth Proportional to 129,781.48, 179,094.54 and 72,422.32

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Solution

The fourth proportional to 129,781.48, 179,094.54 and 72,422.32 is: 99,940.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,781.48 : 179,094.54 = 72,422.32 : x
  2. Step 2: Convert to fraction form
    129,781.48/179,094.54 = 72,422.32/x
  3. Step 3: Cross multiply
    129,781.48x = 179,094.54 × 72,422.32
  4. Step 4: Simplify right side
    129,781.48x = 12,970,442,086.13
  5. Step 5: Solve for x
    x = 12,970,442,086.13/129,781.48
  6. Step 6: Final answer
    x = 99,940.62

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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.