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Finding the Fourth Proportional to 103,610.60, 155,531.10 and 64,212.20

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Solution

The fourth proportional to 103,610.60, 155,531.10 and 64,212.20 is: 96,389.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,610.60 : 155,531.10 = 64,212.20 : x
  2. Step 2: Convert to fraction form
    103,610.60/155,531.10 = 64,212.20/x
  3. Step 3: Cross multiply
    103,610.60x = 155,531.10 × 64,212.20
  4. Step 4: Simplify right side
    103,610.60x = 9,986,994,099.42
  5. Step 5: Solve for x
    x = 9,986,994,099.42/103,610.60
  6. Step 6: Final answer
    x = 96,389.69

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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.