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Finding the Fourth Proportional to 144,589.12, 199,487.52 and 80,916.80

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Solution

The fourth proportional to 144,589.12, 199,487.52 and 80,916.80 is: 111,639.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,589.12 : 199,487.52 = 80,916.80 : x
  2. Step 2: Convert to fraction form
    144,589.12/199,487.52 = 80,916.80/x
  3. Step 3: Cross multiply
    144,589.12x = 199,487.52 × 80,916.80
  4. Step 4: Simplify right side
    144,589.12x = 16,141,891,758.34
  5. Step 5: Solve for x
    x = 16,141,891,758.34/144,589.12
  6. Step 6: Final answer
    x = 111,639.74

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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.