Home / 129,180.01-178,298.40-81,498.55

Finding the Fourth Proportional to 129,180.01, 178,298.40 and 81,498.55

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Solution

The fourth proportional to 129,180.01, 178,298.40 and 81,498.55 is: 112,486.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,180.01 : 178,298.40 = 81,498.55 : x
  2. Step 2: Convert to fraction form
    129,180.01/178,298.40 = 81,498.55/x
  3. Step 3: Cross multiply
    129,180.01x = 178,298.40 × 81,498.55
  4. Step 4: Simplify right side
    129,180.01x = 14,531,061,067.32
  5. Step 5: Solve for x
    x = 14,531,061,067.32/129,180.01
  6. Step 6: Final answer
    x = 112,486.92

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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.