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Finding the Fourth Proportional to 82,716.80, 123,938.40 and 47,595.20

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Solution

The fourth proportional to 82,716.80, 123,938.40 and 47,595.20 is: 71,314.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,716.80 : 123,938.40 = 47,595.20 : x
  2. Step 2: Convert to fraction form
    82,716.80/123,938.40 = 47,595.20/x
  3. Step 3: Cross multiply
    82,716.80x = 123,938.40 × 47,595.20
  4. Step 4: Simplify right side
    82,716.80x = 5,898,872,935.68
  5. Step 5: Solve for x
    x = 5,898,872,935.68/82,716.80
  6. Step 6: Final answer
    x = 71,314.09

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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.