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Finding the Fourth Proportional to 78,689.64, 108,565.03 and 48,051.56

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Solution

The fourth proportional to 78,689.64, 108,565.03 and 48,051.56 is: 66,294.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,689.64 : 108,565.03 = 48,051.56 : x
  2. Step 2: Convert to fraction form
    78,689.64/108,565.03 = 48,051.56/x
  3. Step 3: Cross multiply
    78,689.64x = 108,565.03 × 48,051.56
  4. Step 4: Simplify right side
    78,689.64x = 5,216,718,739.94
  5. Step 5: Solve for x
    x = 5,216,718,739.94/78,689.64
  6. Step 6: Final answer
    x = 66,294.86

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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.