Home / 142,548.20-196,711.64-78,888.68

Finding the Fourth Proportional to 142,548.20, 196,711.64 and 78,888.68

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Solution

The fourth proportional to 142,548.20, 196,711.64 and 78,888.68 is: 108,863.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,548.20 : 196,711.64 = 78,888.68 : x
  2. Step 2: Convert to fraction form
    142,548.20/196,711.64 = 78,888.68/x
  3. Step 3: Cross multiply
    142,548.20x = 196,711.64 × 78,888.68
  4. Step 4: Simplify right side
    142,548.20x = 15,518,321,620.24
  5. Step 5: Solve for x
    x = 15,518,321,620.24/142,548.20
  6. Step 6: Final answer
    x = 108,863.68

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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.