Home / 129,486.92-178,679.16-72,124.31

Finding the Fourth Proportional to 129,486.92, 178,679.16 and 72,124.31

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Solution

The fourth proportional to 129,486.92, 178,679.16 and 72,124.31 is: 99,524.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,486.92 : 178,679.16 = 72,124.31 : x
  2. Step 2: Convert to fraction form
    129,486.92/178,679.16 = 72,124.31/x
  3. Step 3: Cross multiply
    129,486.92x = 178,679.16 × 72,124.31
  4. Step 4: Simplify right side
    129,486.92x = 12,887,110,232.98
  5. Step 5: Solve for x
    x = 12,887,110,232.98/129,486.92
  6. Step 6: Final answer
    x = 99,524.42

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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.