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Finding the Fourth Proportional to 103,611.90, 155,158.65 and 82,875.90

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Solution

The fourth proportional to 103,611.90, 155,158.65 and 82,875.90 is: 124,106.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,611.90 : 155,158.65 = 82,875.90 : x
  2. Step 2: Convert to fraction form
    103,611.90/155,158.65 = 82,875.90/x
  3. Step 3: Cross multiply
    103,611.90x = 155,158.65 × 82,875.90
  4. Step 4: Simplify right side
    103,611.90x = 12,858,912,761.54
  5. Step 5: Solve for x
    x = 12,858,912,761.54/103,611.90
  6. Step 6: Final answer
    x = 124,106.52

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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.