Home / 129,251.85-178,364.41-71,890.98

Finding the Fourth Proportional to 129,251.85, 178,364.41 and 71,890.98

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Solution

The fourth proportional to 129,251.85, 178,364.41 and 71,890.98 is: 99,207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,251.85 : 178,364.41 = 71,890.98 : x
  2. Step 2: Convert to fraction form
    129,251.85/178,364.41 = 71,890.98/x
  3. Step 3: Cross multiply
    129,251.85x = 178,364.41 × 71,890.98
  4. Step 4: Simplify right side
    129,251.85x = 12,822,792,232.02
  5. Step 5: Solve for x
    x = 12,822,792,232.02/129,251.85
  6. Step 6: Final answer
    x = 99,207.80

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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.