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Finding the Fourth Proportional to 103,705.31, 155,689.26 and 63,625.80

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Solution

The fourth proportional to 103,705.31, 155,689.26 and 63,625.80 is: 95,519.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,705.31 : 155,689.26 = 63,625.80 : x
  2. Step 2: Convert to fraction form
    103,705.31/155,689.26 = 63,625.80/x
  3. Step 3: Cross multiply
    103,705.31x = 155,689.26 × 63,625.80
  4. Step 4: Simplify right side
    103,705.31x = 9,905,854,064.15
  5. Step 5: Solve for x
    x = 9,905,854,064.15/103,705.31
  6. Step 6: Final answer
    x = 95,519.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.