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Finding the Fourth Proportional to 142,087.80, 195,960.78 and 85,488.60

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Solution

The fourth proportional to 142,087.80, 195,960.78 and 85,488.60 is: 117,901.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,087.80 : 195,960.78 = 85,488.60 : x
  2. Step 2: Convert to fraction form
    142,087.80/195,960.78 = 85,488.60/x
  3. Step 3: Cross multiply
    142,087.80x = 195,960.78 × 85,488.60
  4. Step 4: Simplify right side
    142,087.80x = 16,752,412,737.11
  5. Step 5: Solve for x
    x = 16,752,412,737.11/142,087.80
  6. Step 6: Final answer
    x = 117,901.84

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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.