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Finding the Fourth Proportional to 130,475.71, 180,144.20 and 81,491.97

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Solution

The fourth proportional to 130,475.71, 180,144.20 and 81,491.97 is: 112,513.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,475.71 : 180,144.20 = 81,491.97 : x
  2. Step 2: Convert to fraction form
    130,475.71/180,144.20 = 81,491.97/x
  3. Step 3: Cross multiply
    130,475.71x = 180,144.20 × 81,491.97
  4. Step 4: Simplify right side
    130,475.71x = 14,680,306,621.34
  5. Step 5: Solve for x
    x = 14,680,306,621.34/130,475.71
  6. Step 6: Final answer
    x = 112,513.71

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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.