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Finding the Fourth Proportional to 48,642.85, 72,921.21 and 19,081.90

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Solution

The fourth proportional to 48,642.85, 72,921.21 and 19,081.90 is: 28,605.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,642.85 : 72,921.21 = 19,081.90 : x
  2. Step 2: Convert to fraction form
    48,642.85/72,921.21 = 19,081.90/x
  3. Step 3: Cross multiply
    48,642.85x = 72,921.21 × 19,081.90
  4. Step 4: Simplify right side
    48,642.85x = 1,391,475,237.10
  5. Step 5: Solve for x
    x = 1,391,475,237.10/48,642.85
  6. Step 6: Final answer
    x = 28,605.96

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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.