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Finding the Fourth Proportional to 129,672.66, 178,962.51 and 75,236.82

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Solution

The fourth proportional to 129,672.66, 178,962.51 and 75,236.82 is: 103,835.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,672.66 : 178,962.51 = 75,236.82 : x
  2. Step 2: Convert to fraction form
    129,672.66/178,962.51 = 75,236.82/x
  3. Step 3: Cross multiply
    129,672.66x = 178,962.51 × 75,236.82
  4. Step 4: Simplify right side
    129,672.66x = 13,464,570,151.62
  5. Step 5: Solve for x
    x = 13,464,570,151.62/129,672.66
  6. Step 6: Final answer
    x = 103,835.07

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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.