Home / 129,624.40-178,825.98-78,617.64

Finding the Fourth Proportional to 129,624.40, 178,825.98 and 78,617.64

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Solution

The fourth proportional to 129,624.40, 178,825.98 and 78,617.64 is: 108,458.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,624.40 : 178,825.98 = 78,617.64 : x
  2. Step 2: Convert to fraction form
    129,624.40/178,825.98 = 78,617.64/x
  3. Step 3: Cross multiply
    129,624.40x = 178,825.98 × 78,617.64
  4. Step 4: Simplify right side
    129,624.40x = 14,058,876,035.58
  5. Step 5: Solve for x
    x = 14,058,876,035.58/129,624.40
  6. Step 6: Final answer
    x = 108,458.56

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1.5x scale

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.