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Finding the Fourth Proportional to 90,308.98, 124,621.92 and 49,473.28

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Solution

The fourth proportional to 90,308.98, 124,621.92 and 49,473.28 is: 68,270.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,308.98 : 124,621.92 = 49,473.28 : x
  2. Step 2: Convert to fraction form
    90,308.98/124,621.92 = 49,473.28/x
  3. Step 3: Cross multiply
    90,308.98x = 124,621.92 × 49,473.28
  4. Step 4: Simplify right side
    90,308.98x = 6,165,455,142.30
  5. Step 5: Solve for x
    x = 6,165,455,142.30/90,308.98
  6. Step 6: Final answer
    x = 68,270.68

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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.