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Finding the Fourth Proportional to 82,547.70, 123,712.20 and 73,143.60

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Solution

The fourth proportional to 82,547.70, 123,712.20 and 73,143.60 is: 109,618.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,547.70 : 123,712.20 = 73,143.60 : x
  2. Step 2: Convert to fraction form
    82,547.70/123,712.20 = 73,143.60/x
  3. Step 3: Cross multiply
    82,547.70x = 123,712.20 × 73,143.60
  4. Step 4: Simplify right side
    82,547.70x = 9,048,755,671.92
  5. Step 5: Solve for x
    x = 9,048,755,671.92/82,547.70
  6. Step 6: Final answer
    x = 109,618.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.