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Finding the Fourth Proportional to 63,018.60, 86,977.26 and 39,139.80

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Solution

The fourth proportional to 63,018.60, 86,977.26 and 39,139.80 is: 54,020.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,018.60 : 86,977.26 = 39,139.80 : x
  2. Step 2: Convert to fraction form
    63,018.60/86,977.26 = 39,139.80/x
  3. Step 3: Cross multiply
    63,018.60x = 86,977.26 × 39,139.80
  4. Step 4: Simplify right side
    63,018.60x = 3,404,272,560.95
  5. Step 5: Solve for x
    x = 3,404,272,560.95/63,018.60
  6. Step 6: Final answer
    x = 54,020.12

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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.