Home / 129,258.24-178,289.28-81,572.64

Finding the Fourth Proportional to 129,258.24, 178,289.28 and 81,572.64

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Solution

The fourth proportional to 129,258.24, 178,289.28 and 81,572.64 is: 112,515.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,258.24 : 178,289.28 = 81,572.64 : x
  2. Step 2: Convert to fraction form
    129,258.24/178,289.28 = 81,572.64/x
  3. Step 3: Cross multiply
    129,258.24x = 178,289.28 × 81,572.64
  4. Step 4: Simplify right side
    129,258.24x = 14,543,527,253.30
  5. Step 5: Solve for x
    x = 14,543,527,253.30/129,258.24
  6. Step 6: Final answer
    x = 112,515.28

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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.