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Finding the Fourth Proportional to 145,330.60, 200,532.90 and 81,668.20

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Solution

The fourth proportional to 145,330.60, 200,532.90 and 81,668.20 is: 112,689.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,330.60 : 200,532.90 = 81,668.20 : x
  2. Step 2: Convert to fraction form
    145,330.60/200,532.90 = 81,668.20/x
  3. Step 3: Cross multiply
    145,330.60x = 200,532.90 × 81,668.20
  4. Step 4: Simplify right side
    145,330.60x = 16,377,160,983.78
  5. Step 5: Solve for x
    x = 16,377,160,983.78/145,330.60
  6. Step 6: Final answer
    x = 112,689.01

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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.