Home / 129,672.29-178,948.55-72,315.24

Finding the Fourth Proportional to 129,672.29, 178,948.55 and 72,315.24

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Solution

The fourth proportional to 129,672.29, 178,948.55 and 72,315.24 is: 99,795.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,672.29 : 178,948.55 = 72,315.24 : x
  2. Step 2: Convert to fraction form
    129,672.29/178,948.55 = 72,315.24/x
  3. Step 3: Cross multiply
    129,672.29x = 178,948.55 × 72,315.24
  4. Step 4: Simplify right side
    129,672.29x = 12,940,707,222.93
  5. Step 5: Solve for x
    x = 12,940,707,222.93/129,672.29
  6. Step 6: Final answer
    x = 99,795.47

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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.