Home / 142,180.28-196,208.63-78,517.92

Finding the Fourth Proportional to 142,180.28, 196,208.63 and 78,517.92

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Solution

The fourth proportional to 142,180.28, 196,208.63 and 78,517.92 is: 108,354.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,180.28 : 196,208.63 = 78,517.92 : x
  2. Step 2: Convert to fraction form
    142,180.28/196,208.63 = 78,517.92/x
  3. Step 3: Cross multiply
    142,180.28x = 196,208.63 × 78,517.92
  4. Step 4: Simplify right side
    142,180.28x = 15,405,893,513.65
  5. Step 5: Solve for x
    x = 15,405,893,513.65/142,180.28
  6. Step 6: Final answer
    x = 108,354.65

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1.5x scale

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.