Home / 142,218.72-196,261.92-78,559.20

Finding the Fourth Proportional to 142,218.72, 196,261.92 and 78,559.20

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Solution

The fourth proportional to 142,218.72, 196,261.92 and 78,559.20 is: 108,411.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,218.72 : 196,261.92 = 78,559.20 : x
  2. Step 2: Convert to fraction form
    142,218.72/196,261.92 = 78,559.20/x
  3. Step 3: Cross multiply
    142,218.72x = 196,261.92 × 78,559.20
  4. Step 4: Simplify right side
    142,218.72x = 15,418,179,425.66
  5. Step 5: Solve for x
    x = 15,418,179,425.66/142,218.72
  6. Step 6: Final answer
    x = 108,411.74

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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.