Home / 129,424.18-178,630.14-78,464.69

Finding the Fourth Proportional to 129,424.18, 178,630.14 and 78,464.69

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Solution

The fourth proportional to 129,424.18, 178,630.14 and 78,464.69 is: 108,296.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,424.18 : 178,630.14 = 78,464.69 : x
  2. Step 2: Convert to fraction form
    129,424.18/178,630.14 = 78,464.69/x
  3. Step 3: Cross multiply
    129,424.18x = 178,630.14 × 78,464.69
  4. Step 4: Simplify right side
    129,424.18x = 14,016,159,027.46
  5. Step 5: Solve for x
    x = 14,016,159,027.46/129,424.18
  6. Step 6: Final answer
    x = 108,296.29

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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.