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Finding the Fourth Proportional to 48,612.30, 72,918.45 and 31,101.90

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Solution

The fourth proportional to 48,612.30, 72,918.45 and 31,101.90 is: 46,652.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,612.30 : 72,918.45 = 31,101.90 : x
  2. Step 2: Convert to fraction form
    48,612.30/72,918.45 = 31,101.90/x
  3. Step 3: Cross multiply
    48,612.30x = 72,918.45 × 31,101.90
  4. Step 4: Simplify right side
    48,612.30x = 2,267,902,340.06
  5. Step 5: Solve for x
    x = 2,267,902,340.06/48,612.30
  6. Step 6: Final answer
    x = 46,652.85

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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.