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Finding the Fourth Proportional to 78,895.09, 108,871.14 and 43,078.18

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Solution

The fourth proportional to 78,895.09, 108,871.14 and 43,078.18 is: 59,445.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,895.09 : 108,871.14 = 43,078.18 : x
  2. Step 2: Convert to fraction form
    78,895.09/108,871.14 = 43,078.18/x
  3. Step 3: Cross multiply
    78,895.09x = 108,871.14 × 43,078.18
  4. Step 4: Simplify right side
    78,895.09x = 4,689,970,565.73
  5. Step 5: Solve for x
    x = 4,689,970,565.73/78,895.09
  6. Step 6: Final answer
    x = 59,445.66

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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.