Home / 142,769.43-197,017.54-78,237.90

Finding the Fourth Proportional to 142,769.43, 197,017.54 and 78,237.90

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Solution

The fourth proportional to 142,769.43, 197,017.54 and 78,237.90 is: 107,965.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,769.43 : 197,017.54 = 78,237.90 : x
  2. Step 2: Convert to fraction form
    142,769.43/197,017.54 = 78,237.90/x
  3. Step 3: Cross multiply
    142,769.43x = 197,017.54 × 78,237.90
  4. Step 4: Simplify right side
    142,769.43x = 15,414,238,397.17
  5. Step 5: Solve for x
    x = 15,414,238,397.17/142,769.43
  6. Step 6: Final answer
    x = 107,965.96

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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.