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Finding the Fourth Proportional to 78,808.18, 108,764.85 and 57,576.82

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Solution

The fourth proportional to 78,808.18, 108,764.85 and 57,576.82 is: 79,463.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,808.18 : 108,764.85 = 57,576.82 : x
  2. Step 2: Convert to fraction form
    78,808.18/108,764.85 = 57,576.82/x
  3. Step 3: Cross multiply
    78,808.18x = 108,764.85 × 57,576.82
  4. Step 4: Simplify right side
    78,808.18x = 6,262,334,190.78
  5. Step 5: Solve for x
    x = 6,262,334,190.78/78,808.18
  6. Step 6: Final answer
    x = 79,463.00

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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.