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Finding the Fourth Proportional to 119,680.95, 179,381.30 and 76,931.85

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Solution

The fourth proportional to 119,680.95, 179,381.30 and 76,931.85 is: 115,307.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,680.95 : 179,381.30 = 76,931.85 : x
  2. Step 2: Convert to fraction form
    119,680.95/179,381.30 = 76,931.85/x
  3. Step 3: Cross multiply
    119,680.95x = 179,381.30 × 76,931.85
  4. Step 4: Simplify right side
    119,680.95x = 13,800,134,879.75
  5. Step 5: Solve for x
    x = 13,800,134,879.75/119,680.95
  6. Step 6: Final answer
    x = 115,307.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.