Home / 142,609.20-196,799.40-78,949.68

Finding the Fourth Proportional to 142,609.20, 196,799.40 and 78,949.68

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Solution

The fourth proportional to 142,609.20, 196,799.40 and 78,949.68 is: 108,949.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,609.20 : 196,799.40 = 78,949.68 : x
  2. Step 2: Convert to fraction form
    142,609.20/196,799.40 = 78,949.68/x
  3. Step 3: Cross multiply
    142,609.20x = 196,799.40 × 78,949.68
  4. Step 4: Simplify right side
    142,609.20x = 15,537,249,654.19
  5. Step 5: Solve for x
    x = 15,537,249,654.19/142,609.20
  6. Step 6: Final answer
    x = 108,949.84

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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.