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Finding the Fourth Proportional to 103,487.88, 155,199.42 and 68,612.52

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Solution

The fourth proportional to 103,487.88, 155,199.42 and 68,612.52 is: 102,897.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,487.88 : 155,199.42 = 68,612.52 : x
  2. Step 2: Convert to fraction form
    103,487.88/155,199.42 = 68,612.52/x
  3. Step 3: Cross multiply
    103,487.88x = 155,199.42 × 68,612.52
  4. Step 4: Simplify right side
    103,487.88x = 10,648,623,308.74
  5. Step 5: Solve for x
    x = 10,648,623,308.74/103,487.88
  6. Step 6: Final answer
    x = 102,897.30

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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.