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Finding the Fourth Proportional to 71,894.72, 108,230.30 and 64,661.18

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Solution

The fourth proportional to 71,894.72, 108,230.30 and 64,661.18 is: 97,340.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,894.72 : 108,230.30 = 64,661.18 : x
  2. Step 2: Convert to fraction form
    71,894.72/108,230.30 = 64,661.18/x
  3. Step 3: Cross multiply
    71,894.72x = 108,230.30 × 64,661.18
  4. Step 4: Simplify right side
    71,894.72x = 6,998,298,909.75
  5. Step 5: Solve for x
    x = 6,998,298,909.75/71,894.72
  6. Step 6: Final answer
    x = 97,340.93

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.