Home / 142,000.11-195,960.13-78,337.90

Finding the Fourth Proportional to 142,000.11, 195,960.13 and 78,337.90

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Solution

The fourth proportional to 142,000.11, 195,960.13 and 78,337.90 is: 108,106.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,000.11 : 195,960.13 = 78,337.90 : x
  2. Step 2: Convert to fraction form
    142,000.11/195,960.13 = 78,337.90/x
  3. Step 3: Cross multiply
    142,000.11x = 195,960.13 × 78,337.90
  4. Step 4: Simplify right side
    142,000.11x = 15,351,104,382.18
  5. Step 5: Solve for x
    x = 15,351,104,382.18/142,000.11
  6. Step 6: Final answer
    x = 108,106.29

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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.