Home / 78,058.11-117,149.40-28,173.18

Finding the Fourth Proportional to 78,058.11, 117,149.40 and 28,173.18

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Solution

The fourth proportional to 78,058.11, 117,149.40 and 28,173.18 is: 42,282.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,058.11 : 117,149.40 = 28,173.18 : x
  2. Step 2: Convert to fraction form
    78,058.11/117,149.40 = 28,173.18/x
  3. Step 3: Cross multiply
    78,058.11x = 117,149.40 × 28,173.18
  4. Step 4: Simplify right side
    78,058.11x = 3,300,471,133.09
  5. Step 5: Solve for x
    x = 3,300,471,133.09/78,058.11
  6. Step 6: Final answer
    x = 42,282.23

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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.