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Finding the Fourth Proportional to 78,675.80, 108,710.70 and 62,890.52

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Solution

The fourth proportional to 78,675.80, 108,710.70 and 62,890.52 is: 86,899.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,675.80 : 108,710.70 = 62,890.52 : x
  2. Step 2: Convert to fraction form
    78,675.80/108,710.70 = 62,890.52/x
  3. Step 3: Cross multiply
    78,675.80x = 108,710.70 × 62,890.52
  4. Step 4: Simplify right side
    78,675.80x = 6,836,872,452.56
  5. Step 5: Solve for x
    x = 6,836,872,452.56/78,675.80
  6. Step 6: Final answer
    x = 86,899.31

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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.