Home / 142,305.76-196,380.14-78,642.19

Finding the Fourth Proportional to 142,305.76, 196,380.14 and 78,642.19

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Solution

The fourth proportional to 142,305.76, 196,380.14 and 78,642.19 is: 108,525.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,305.76 : 196,380.14 = 78,642.19 : x
  2. Step 2: Convert to fraction form
    142,305.76/196,380.14 = 78,642.19/x
  3. Step 3: Cross multiply
    142,305.76x = 196,380.14 × 78,642.19
  4. Step 4: Simplify right side
    142,305.76x = 15,443,764,282.11
  5. Step 5: Solve for x
    x = 15,443,764,282.11/142,305.76
  6. Step 6: Final answer
    x = 108,525.22

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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.