Home / 129,701.44-178,987.62-72,340.84

Finding the Fourth Proportional to 129,701.44, 178,987.62 and 72,340.84

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Solution

The fourth proportional to 129,701.44, 178,987.62 and 72,340.84 is: 99,830.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,701.44 : 178,987.62 = 72,340.84 : x
  2. Step 2: Convert to fraction form
    129,701.44/178,987.62 = 72,340.84/x
  3. Step 3: Cross multiply
    129,701.44x = 178,987.62 × 72,340.84
  4. Step 4: Simplify right side
    129,701.44x = 12,948,114,780.40
  5. Step 5: Solve for x
    x = 12,948,114,780.40/129,701.44
  6. Step 6: Final answer
    x = 99,830.15

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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.