Home / 142,318.11-196,411.33-78,668.21

Finding the Fourth Proportional to 142,318.11, 196,411.33 and 78,668.21

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Solution

The fourth proportional to 142,318.11, 196,411.33 and 78,668.21 is: 108,568.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,318.11 : 196,411.33 = 78,668.21 : x
  2. Step 2: Convert to fraction form
    142,318.11/196,411.33 = 78,668.21/x
  3. Step 3: Cross multiply
    142,318.11x = 196,411.33 × 78,668.21
  4. Step 4: Simplify right side
    142,318.11x = 15,451,328,344.18
  5. Step 5: Solve for x
    x = 15,451,328,344.18/142,318.11
  6. Step 6: Final answer
    x = 108,568.95

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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.