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Finding the Fourth Proportional to 78,659.46, 108,549.36 and 42,849.36

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Solution

The fourth proportional to 78,659.46, 108,549.36 and 42,849.36 is: 59,131.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,659.46 : 108,549.36 = 42,849.36 : x
  2. Step 2: Convert to fraction form
    78,659.46/108,549.36 = 42,849.36/x
  3. Step 3: Cross multiply
    78,659.46x = 108,549.36 × 42,849.36
  4. Step 4: Simplify right side
    78,659.46x = 4,651,270,604.41
  5. Step 5: Solve for x
    x = 4,651,270,604.41/78,659.46
  6. Step 6: Final answer
    x = 59,131.74

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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.