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Finding the Fourth Proportional to 136,280.80, 204,421.20 and 115,544.80

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Solution

The fourth proportional to 136,280.80, 204,421.20 and 115,544.80 is: 173,317.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,280.80 : 204,421.20 = 115,544.80 : x
  2. Step 2: Convert to fraction form
    136,280.80/204,421.20 = 115,544.80/x
  3. Step 3: Cross multiply
    136,280.80x = 204,421.20 × 115,544.80
  4. Step 4: Simplify right side
    136,280.80x = 23,619,806,669.76
  5. Step 5: Solve for x
    x = 23,619,806,669.76/136,280.80
  6. Step 6: Final answer
    x = 173,317.20

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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.