Home / 81,081-121,539.42-38,899.08

Finding the Fourth Proportional to 81,081, 121,539.42 and 38,899.08

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Solution

The fourth proportional to 81,081, 121,539.42 and 38,899.08 is: 58,309.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,081 : 121,539.42 = 38,899.08 : x
  2. Step 2: Convert to fraction form
    81,081/121,539.42 = 38,899.08/x
  3. Step 3: Cross multiply
    81,081x = 121,539.42 × 38,899.08
  4. Step 4: Simplify right side
    81,081x = 4,727,771,621.73
  5. Step 5: Solve for x
    x = 4,727,771,621.73/81,081
  6. Step 6: Final answer
    x = 58,309.24

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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.