Home / 129,433.20-178,672.92-87,016.32

Finding the Fourth Proportional to 129,433.20, 178,672.92 and 87,016.32

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Solution

The fourth proportional to 129,433.20, 178,672.92 and 87,016.32 is: 120,119.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,433.20 : 178,672.92 = 87,016.32 : x
  2. Step 2: Convert to fraction form
    129,433.20/178,672.92 = 87,016.32/x
  3. Step 3: Cross multiply
    129,433.20x = 178,672.92 × 87,016.32
  4. Step 4: Simplify right side
    129,433.20x = 15,547,459,982.05
  5. Step 5: Solve for x
    x = 15,547,459,982.05/129,433.20
  6. Step 6: Final answer
    x = 120,119.57

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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.