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Finding the Fourth Proportional to 103,615.60, 155,500.20 and 68,543.60

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Solution

The fourth proportional to 103,615.60, 155,500.20 and 68,543.60 is: 102,866.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,615.60 : 155,500.20 = 68,543.60 : x
  2. Step 2: Convert to fraction form
    103,615.60/155,500.20 = 68,543.60/x
  3. Step 3: Cross multiply
    103,615.60x = 155,500.20 × 68,543.60
  4. Step 4: Simplify right side
    103,615.60x = 10,658,543,508.72
  5. Step 5: Solve for x
    x = 10,658,543,508.72/103,615.60
  6. Step 6: Final answer
    x = 102,866.20

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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.