Home / 143,425.72-197,932.28-78,897.68

Finding the Fourth Proportional to 143,425.72, 197,932.28 and 78,897.68

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Solution

The fourth proportional to 143,425.72, 197,932.28 and 78,897.68 is: 108,881.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,425.72 : 197,932.28 = 78,897.68 : x
  2. Step 2: Convert to fraction form
    143,425.72/197,932.28 = 78,897.68/x
  3. Step 3: Cross multiply
    143,425.72x = 197,932.28 × 78,897.68
  4. Step 4: Simplify right side
    143,425.72x = 15,616,397,689.11
  5. Step 5: Solve for x
    x = 15,616,397,689.11/143,425.72
  6. Step 6: Final answer
    x = 108,881.43

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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.