Home / 57,087.87-78,780-31,246.29

Finding the Fourth Proportional to 57,087.87, 78,780 and 31,246.29

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Solution

The fourth proportional to 57,087.87, 78,780 and 31,246.29 is: 43,119.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,087.87 : 78,780 = 31,246.29 : x
  2. Step 2: Convert to fraction form
    57,087.87/78,780 = 31,246.29/x
  3. Step 3: Cross multiply
    57,087.87x = 78,780 × 31,246.29
  4. Step 4: Simplify right side
    57,087.87x = 2,461,582,726.20
  5. Step 5: Solve for x
    x = 2,461,582,726.20/57,087.87
  6. Step 6: Final answer
    x = 43,119.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.