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Finding the Fourth Proportional to 78,809.57, 108,757.56 and 43,000.34

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Solution

The fourth proportional to 78,809.57, 108,757.56 and 43,000.34 is: 59,340.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,809.57 : 108,757.56 = 43,000.34 : x
  2. Step 2: Convert to fraction form
    78,809.57/108,757.56 = 43,000.34/x
  3. Step 3: Cross multiply
    78,809.57x = 108,757.56 × 43,000.34
  4. Step 4: Simplify right side
    78,809.57x = 4,676,611,513.78
  5. Step 5: Solve for x
    x = 4,676,611,513.78/78,809.57
  6. Step 6: Final answer
    x = 59,340.66

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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.