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Finding the Fourth Proportional to 129,422.44, 178,602.60 and 72,833.86

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Solution

The fourth proportional to 129,422.44, 178,602.60 and 72,833.86 is: 100,510.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,422.44 : 178,602.60 = 72,833.86 : x
  2. Step 2: Convert to fraction form
    129,422.44/178,602.60 = 72,833.86/x
  3. Step 3: Cross multiply
    129,422.44x = 178,602.60 × 72,833.86
  4. Step 4: Simplify right side
    129,422.44x = 13,008,316,764.04
  5. Step 5: Solve for x
    x = 13,008,316,764.04/129,422.44
  6. Step 6: Final answer
    x = 100,510.52

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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.