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Finding the Fourth Proportional to 148,667.70, 205,157.88 and 80,681.76

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Solution

The fourth proportional to 148,667.70, 205,157.88 and 80,681.76 is: 111,338.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,667.70 : 205,157.88 = 80,681.76 : x
  2. Step 2: Convert to fraction form
    148,667.70/205,157.88 = 80,681.76/x
  3. Step 3: Cross multiply
    148,667.70x = 205,157.88 × 80,681.76
  4. Step 4: Simplify right side
    148,667.70x = 16,552,498,836.27
  5. Step 5: Solve for x
    x = 16,552,498,836.27/148,667.70
  6. Step 6: Final answer
    x = 111,338.90

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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.