Home / 129,178.40-178,269.24-71,819.46

Finding the Fourth Proportional to 129,178.40, 178,269.24 and 71,819.46

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Solution

The fourth proportional to 129,178.40, 178,269.24 and 71,819.46 is: 99,112.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,178.40 : 178,269.24 = 71,819.46 : x
  2. Step 2: Convert to fraction form
    129,178.40/178,269.24 = 71,819.46/x
  3. Step 3: Cross multiply
    129,178.40x = 178,269.24 × 71,819.46
  4. Step 4: Simplify right side
    129,178.40x = 12,803,200,551.41
  5. Step 5: Solve for x
    x = 12,803,200,551.41/129,178.40
  6. Step 6: Final answer
    x = 99,112.55

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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.