Home / 142,133.11-196,143.14-78,470.44

Finding the Fourth Proportional to 142,133.11, 196,143.14 and 78,470.44

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Solution

The fourth proportional to 142,133.11, 196,143.14 and 78,470.44 is: 108,288.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,133.11 : 196,143.14 = 78,470.44 : x
  2. Step 2: Convert to fraction form
    142,133.11/196,143.14 = 78,470.44/x
  3. Step 3: Cross multiply
    142,133.11x = 196,143.14 × 78,470.44
  4. Step 4: Simplify right side
    142,133.11x = 15,391,438,204.60
  5. Step 5: Solve for x
    x = 15,391,438,204.60/142,133.11
  6. Step 6: Final answer
    x = 108,288.90

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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.