Home / 129,432.76-178,587.66-72,823.48

Finding the Fourth Proportional to 129,432.76, 178,587.66 and 72,823.48

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Solution

The fourth proportional to 129,432.76, 178,587.66 and 72,823.48 is: 100,479.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,432.76 : 178,587.66 = 72,823.48 : x
  2. Step 2: Convert to fraction form
    129,432.76/178,587.66 = 72,823.48/x
  3. Step 3: Cross multiply
    129,432.76x = 178,587.66 × 72,823.48
  4. Step 4: Simplify right side
    129,432.76x = 13,005,374,886.26
  5. Step 5: Solve for x
    x = 13,005,374,886.26/129,432.76
  6. Step 6: Final answer
    x = 100,479.78

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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.