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Finding the Fourth Proportional to 88,265.80, 121,803.45 and 47,978.73

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Solution

The fourth proportional to 88,265.80, 121,803.45 and 47,978.73 is: 66,208.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,265.80 : 121,803.45 = 47,978.73 : x
  2. Step 2: Convert to fraction form
    88,265.80/121,803.45 = 47,978.73/x
  3. Step 3: Cross multiply
    88,265.80x = 121,803.45 × 47,978.73
  4. Step 4: Simplify right side
    88,265.80x = 5,843,974,660.70
  5. Step 5: Solve for x
    x = 5,843,974,660.70/88,265.80
  6. Step 6: Final answer
    x = 66,208.82

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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.