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Finding the Fourth Proportional to 82,312.68, 123,480.78 and 25,391.40

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Solution

The fourth proportional to 82,312.68, 123,480.78 and 25,391.40 is: 38,090.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,312.68 : 123,480.78 = 25,391.40 : x
  2. Step 2: Convert to fraction form
    82,312.68/123,480.78 = 25,391.40/x
  3. Step 3: Cross multiply
    82,312.68x = 123,480.78 × 25,391.40
  4. Step 4: Simplify right side
    82,312.68x = 3,135,349,877.29
  5. Step 5: Solve for x
    x = 3,135,349,877.29/82,312.68
  6. Step 6: Final answer
    x = 38,090.73

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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.