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Finding the Fourth Proportional to 78,817.30, 108,769.84 and 43,007.88

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Solution

The fourth proportional to 78,817.30, 108,769.84 and 43,007.88 is: 59,351.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,817.30 : 108,769.84 = 43,007.88 : x
  2. Step 2: Convert to fraction form
    78,817.30/108,769.84 = 43,007.88/x
  3. Step 3: Cross multiply
    78,817.30x = 108,769.84 × 43,007.88
  4. Step 4: Simplify right side
    78,817.30x = 4,677,960,226.34
  5. Step 5: Solve for x
    x = 4,677,960,226.34/78,817.30
  6. Step 6: Final answer
    x = 59,351.95

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1.5x scale

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.