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Finding the Fourth Proportional to 80,491.19, 120,709.45 and 27,888.40

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Solution

The fourth proportional to 80,491.19, 120,709.45 and 27,888.40 is: 41,823.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,491.19 : 120,709.45 = 27,888.40 : x
  2. Step 2: Convert to fraction form
    80,491.19/120,709.45 = 27,888.40/x
  3. Step 3: Cross multiply
    80,491.19x = 120,709.45 × 27,888.40
  4. Step 4: Simplify right side
    80,491.19x = 3,366,393,053.89
  5. Step 5: Solve for x
    x = 3,366,393,053.89/80,491.19
  6. Step 6: Final answer
    x = 41,823.12

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1.5x scale

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.