Home / 129,521.28-178,742.64-72,934.56

Finding the Fourth Proportional to 129,521.28, 178,742.64 and 72,934.56

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Solution

The fourth proportional to 129,521.28, 178,742.64 and 72,934.56 is: 100,651.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,521.28 : 178,742.64 = 72,934.56 : x
  2. Step 2: Convert to fraction form
    129,521.28/178,742.64 = 72,934.56/x
  3. Step 3: Cross multiply
    129,521.28x = 178,742.64 × 72,934.56
  4. Step 4: Simplify right side
    129,521.28x = 13,036,515,801.64
  5. Step 5: Solve for x
    x = 13,036,515,801.64/129,521.28
  6. Step 6: Final answer
    x = 100,651.54

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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.