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Finding the Fourth Proportional to 100,689.60, 150,904.80 and 61,204.80

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Solution

The fourth proportional to 100,689.60, 150,904.80 and 61,204.80 is: 91,728.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,689.60 : 150,904.80 = 61,204.80 : x
  2. Step 2: Convert to fraction form
    100,689.60/150,904.80 = 61,204.80/x
  3. Step 3: Cross multiply
    100,689.60x = 150,904.80 × 61,204.80
  4. Step 4: Simplify right side
    100,689.60x = 9,236,098,103.04
  5. Step 5: Solve for x
    x = 9,236,098,103.04/100,689.60
  6. Step 6: Final answer
    x = 91,728.42

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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.