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Finding the Fourth Proportional to 136,918.71, 205,400.75 and 43,446.87

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Solution

The fourth proportional to 136,918.71, 205,400.75 and 43,446.87 is: 65,177.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,918.71 : 205,400.75 = 43,446.87 : x
  2. Step 2: Convert to fraction form
    136,918.71/205,400.75 = 43,446.87/x
  3. Step 3: Cross multiply
    136,918.71x = 205,400.75 × 43,446.87
  4. Step 4: Simplify right side
    136,918.71x = 8,924,019,465.92
  5. Step 5: Solve for x
    x = 8,924,019,465.92/136,918.71
  6. Step 6: Final answer
    x = 65,177.50

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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.