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Finding the Fourth Proportional to 88,391.56, 121,978 and 48,104.45

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Solution

The fourth proportional to 88,391.56, 121,978 and 48,104.45 is: 66,382.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,391.56 : 121,978 = 48,104.45 : x
  2. Step 2: Convert to fraction form
    88,391.56/121,978 = 48,104.45/x
  3. Step 3: Cross multiply
    88,391.56x = 121,978 × 48,104.45
  4. Step 4: Simplify right side
    88,391.56x = 5,867,684,602.10
  5. Step 5: Solve for x
    x = 5,867,684,602.10/88,391.56
  6. Step 6: Final answer
    x = 66,382.86

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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.