Home / 129,672.73-178,941.45-72,317.94

Finding the Fourth Proportional to 129,672.73, 178,941.45 and 72,317.94

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Solution

The fourth proportional to 129,672.73, 178,941.45 and 72,317.94 is: 99,794.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,672.73 : 178,941.45 = 72,317.94 : x
  2. Step 2: Convert to fraction form
    129,672.73/178,941.45 = 72,317.94/x
  3. Step 3: Cross multiply
    129,672.73x = 178,941.45 × 72,317.94
  4. Step 4: Simplify right side
    129,672.73x = 12,940,677,044.61
  5. Step 5: Solve for x
    x = 12,940,677,044.61/129,672.73
  6. Step 6: Final answer
    x = 99,794.90

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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.