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Finding the Fourth Proportional to 145,591.92, 200,916.21 and 81,930.78

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Solution

The fourth proportional to 145,591.92, 200,916.21 and 81,930.78 is: 113,064.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,591.92 : 200,916.21 = 81,930.78 : x
  2. Step 2: Convert to fraction form
    145,591.92/200,916.21 = 81,930.78/x
  3. Step 3: Cross multiply
    145,591.92x = 200,916.21 × 81,930.78
  4. Step 4: Simplify right side
    145,591.92x = 16,461,221,799.94
  5. Step 5: Solve for x
    x = 16,461,221,799.94/145,591.92
  6. Step 6: Final answer
    x = 113,064.12

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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.