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Finding the Fourth Proportional to 82,129.04, 123,192.48 and 19,799.04

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Solution

The fourth proportional to 82,129.04, 123,192.48 and 19,799.04 is: 29,698.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,129.04 : 123,192.48 = 19,799.04 : x
  2. Step 2: Convert to fraction form
    82,129.04/123,192.48 = 19,799.04/x
  3. Step 3: Cross multiply
    82,129.04x = 123,192.48 × 19,799.04
  4. Step 4: Simplify right side
    82,129.04x = 2,439,092,839.22
  5. Step 5: Solve for x
    x = 2,439,092,839.22/82,129.04
  6. Step 6: Final answer
    x = 29,698.30

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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.