Home / 129,484.26-178,646.58-78,517.44

Finding the Fourth Proportional to 129,484.26, 178,646.58 and 78,517.44

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Solution

The fourth proportional to 129,484.26, 178,646.58 and 78,517.44 is: 108,328.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,484.26 : 178,646.58 = 78,517.44 : x
  2. Step 2: Convert to fraction form
    129,484.26/178,646.58 = 78,517.44/x
  3. Step 3: Cross multiply
    129,484.26x = 178,646.58 × 78,517.44
  4. Step 4: Simplify right side
    129,484.26x = 14,026,872,126.36
  5. Step 5: Solve for x
    x = 14,026,872,126.36/129,484.26
  6. Step 6: Final answer
    x = 108,328.78

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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.