Home / 129,586.20-178,830.74-72,223.92

Finding the Fourth Proportional to 129,586.20, 178,830.74 and 72,223.92

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Solution

The fourth proportional to 129,586.20, 178,830.74 and 72,223.92 is: 99,670.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,586.20 : 178,830.74 = 72,223.92 : x
  2. Step 2: Convert to fraction form
    129,586.20/178,830.74 = 72,223.92/x
  3. Step 3: Cross multiply
    129,586.20x = 178,830.74 × 72,223.92
  4. Step 4: Simplify right side
    129,586.20x = 12,915,856,833.60
  5. Step 5: Solve for x
    x = 12,915,856,833.60/129,586.20
  6. Step 6: Final answer
    x = 99,670.01

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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.