Home / 129,488.26-178,652.10-78,521.44

Finding the Fourth Proportional to 129,488.26, 178,652.10 and 78,521.44

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Solution

The fourth proportional to 129,488.26, 178,652.10 and 78,521.44 is: 108,334.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,488.26 : 178,652.10 = 78,521.44 : x
  2. Step 2: Convert to fraction form
    129,488.26/178,652.10 = 78,521.44/x
  3. Step 3: Cross multiply
    129,488.26x = 178,652.10 × 78,521.44
  4. Step 4: Simplify right side
    129,488.26x = 14,028,020,151.02
  5. Step 5: Solve for x
    x = 14,028,020,151.02/129,488.26
  6. Step 6: Final answer
    x = 108,334.30

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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.