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Finding the Fourth Proportional to 103,794.20, 155,691.30 and 80,466.20

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Solution

The fourth proportional to 103,794.20, 155,691.30 and 80,466.20 is: 120,699.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,794.20 : 155,691.30 = 80,466.20 : x
  2. Step 2: Convert to fraction form
    103,794.20/155,691.30 = 80,466.20/x
  3. Step 3: Cross multiply
    103,794.20x = 155,691.30 × 80,466.20
  4. Step 4: Simplify right side
    103,794.20x = 12,527,887,284.06
  5. Step 5: Solve for x
    x = 12,527,887,284.06/103,794.20
  6. Step 6: Final answer
    x = 120,699.30

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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.