Home / 87,705.40-121,033.48-47,419.15

Finding the Fourth Proportional to 87,705.40, 121,033.48 and 47,419.15

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Solution

The fourth proportional to 87,705.40, 121,033.48 and 47,419.15 is: 65,438.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,705.40 : 121,033.48 = 47,419.15 : x
  2. Step 2: Convert to fraction form
    87,705.40/121,033.48 = 47,419.15/x
  3. Step 3: Cross multiply
    87,705.40x = 121,033.48 × 47,419.15
  4. Step 4: Simplify right side
    87,705.40x = 5,739,304,743.14
  5. Step 5: Solve for x
    x = 5,739,304,743.14/87,705.40
  6. Step 6: Final answer
    x = 65,438.44

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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.