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Finding the Fourth Proportional to 71,647.80, 98,807.90 and 48,712.11

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Solution

The fourth proportional to 71,647.80, 98,807.90 and 48,712.11 is: 67,177.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,647.80 : 98,807.90 = 48,712.11 : x
  2. Step 2: Convert to fraction form
    71,647.80/98,807.90 = 48,712.11/x
  3. Step 3: Cross multiply
    71,647.80x = 98,807.90 × 48,712.11
  4. Step 4: Simplify right side
    71,647.80x = 4,813,141,050.11
  5. Step 5: Solve for x
    x = 4,813,141,050.11/71,647.80
  6. Step 6: Final answer
    x = 67,177.79

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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.