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Finding the Fourth Proportional to 136,486.40, 188,343.54 and 75,230.55

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Solution

The fourth proportional to 136,486.40, 188,343.54 and 75,230.55 is: 103,813.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,486.40 : 188,343.54 = 75,230.55 : x
  2. Step 2: Convert to fraction form
    136,486.40/188,343.54 = 75,230.55/x
  3. Step 3: Cross multiply
    136,486.40x = 188,343.54 × 75,230.55
  4. Step 4: Simplify right side
    136,486.40x = 14,169,188,103.15
  5. Step 5: Solve for x
    x = 14,169,188,103.15/136,486.40
  6. Step 6: Final answer
    x = 103,813.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.