Home / 129,374.17-178,519.45-72,015.90

Finding the Fourth Proportional to 129,374.17, 178,519.45 and 72,015.90

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Solution

The fourth proportional to 129,374.17, 178,519.45 and 72,015.90 is: 99,372.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,374.17 : 178,519.45 = 72,015.90 : x
  2. Step 2: Convert to fraction form
    129,374.17/178,519.45 = 72,015.90/x
  3. Step 3: Cross multiply
    129,374.17x = 178,519.45 × 72,015.90
  4. Step 4: Simplify right side
    129,374.17x = 12,856,238,859.26
  5. Step 5: Solve for x
    x = 12,856,238,859.26/129,374.17
  6. Step 6: Final answer
    x = 99,372.53

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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.