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Finding the Fourth Proportional to 120,391.49, 179,855.11 and 77,925.62

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Solution

The fourth proportional to 120,391.49, 179,855.11 and 77,925.62 is: 116,414.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,391.49 : 179,855.11 = 77,925.62 : x
  2. Step 2: Convert to fraction form
    120,391.49/179,855.11 = 77,925.62/x
  3. Step 3: Cross multiply
    120,391.49x = 179,855.11 × 77,925.62
  4. Step 4: Simplify right side
    120,391.49x = 14,015,320,956.92
  5. Step 5: Solve for x
    x = 14,015,320,956.92/120,391.49
  6. Step 6: Final answer
    x = 116,414.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.