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Finding the Fourth Proportional to 81,605.10, 122,407.65 and 44,280.30

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Solution

The fourth proportional to 81,605.10, 122,407.65 and 44,280.30 is: 66,420.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,605.10 : 122,407.65 = 44,280.30 : x
  2. Step 2: Convert to fraction form
    81,605.10/122,407.65 = 44,280.30/x
  3. Step 3: Cross multiply
    81,605.10x = 122,407.65 × 44,280.30
  4. Step 4: Simplify right side
    81,605.10x = 5,420,247,464.30
  5. Step 5: Solve for x
    x = 5,420,247,464.30/81,605.10
  6. Step 6: Final answer
    x = 66,420.45

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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.