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Finding the Fourth Proportional to 78,460.64, 108,250.80 and 48,669.92

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Solution

The fourth proportional to 78,460.64, 108,250.80 and 48,669.92 is: 67,149.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,460.64 : 108,250.80 = 48,669.92 : x
  2. Step 2: Convert to fraction form
    78,460.64/108,250.80 = 48,669.92/x
  3. Step 3: Cross multiply
    78,460.64x = 108,250.80 × 48,669.92
  4. Step 4: Simplify right side
    78,460.64x = 5,268,557,775.94
  5. Step 5: Solve for x
    x = 5,268,557,775.94/78,460.64
  6. Step 6: Final answer
    x = 67,149.05

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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.