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Finding the Fourth Proportional to 103,611.15, 155,157.53 and 82,875.15

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Solution

The fourth proportional to 103,611.15, 155,157.53 and 82,875.15 is: 124,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,611.15 : 155,157.53 = 82,875.15 : x
  2. Step 2: Convert to fraction form
    103,611.15/155,157.53 = 82,875.15/x
  3. Step 3: Cross multiply
    103,611.15x = 155,157.53 × 82,875.15
  4. Step 4: Simplify right side
    103,611.15x = 12,858,703,158.00
  5. Step 5: Solve for x
    x = 12,858,703,158.00/103,611.15
  6. Step 6: Final answer
    x = 124,105.40

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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.