Home / 129,428.87-178,569.03-75,675.83

Finding the Fourth Proportional to 129,428.87, 178,569.03 and 75,675.83

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Solution

The fourth proportional to 129,428.87, 178,569.03 and 75,675.83 is: 104,407.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,428.87 : 178,569.03 = 75,675.83 : x
  2. Step 2: Convert to fraction form
    129,428.87/178,569.03 = 75,675.83/x
  3. Step 3: Cross multiply
    129,428.87x = 178,569.03 × 75,675.83
  4. Step 4: Simplify right side
    129,428.87x = 13,513,359,237.87
  5. Step 5: Solve for x
    x = 13,513,359,237.87/129,428.87
  6. Step 6: Final answer
    x = 104,407.61

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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.