Home / 129,176.25-178,279.93-72,587.63

Finding the Fourth Proportional to 129,176.25, 178,279.93 and 72,587.63

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Solution

The fourth proportional to 129,176.25, 178,279.93 and 72,587.63 is: 100,180.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,176.25 : 178,279.93 = 72,587.63 : x
  2. Step 2: Convert to fraction form
    129,176.25/178,279.93 = 72,587.63/x
  3. Step 3: Cross multiply
    129,176.25x = 178,279.93 × 72,587.63
  4. Step 4: Simplify right side
    129,176.25x = 12,940,917,595.27
  5. Step 5: Solve for x
    x = 12,940,917,595.27/129,176.25
  6. Step 6: Final answer
    x = 100,180.32

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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.