Home / 81,165.13-121,791.30-39,612.13

Finding the Fourth Proportional to 81,165.13, 121,791.30 and 39,612.13

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Solution

The fourth proportional to 81,165.13, 121,791.30 and 39,612.13 is: 59,439.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,165.13 : 121,791.30 = 39,612.13 : x
  2. Step 2: Convert to fraction form
    81,165.13/121,791.30 = 39,612.13/x
  3. Step 3: Cross multiply
    81,165.13x = 121,791.30 × 39,612.13
  4. Step 4: Simplify right side
    81,165.13x = 4,824,412,808.47
  5. Step 5: Solve for x
    x = 4,824,412,808.47/81,165.13
  6. Step 6: Final answer
    x = 59,439.48

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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.