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Finding the Fourth Proportional to 136,681.92, 205,021.62 and 43,187.67

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Solution

The fourth proportional to 136,681.92, 205,021.62 and 43,187.67 is: 64,781.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,681.92 : 205,021.62 = 43,187.67 : x
  2. Step 2: Convert to fraction form
    136,681.92/205,021.62 = 43,187.67/x
  3. Step 3: Cross multiply
    136,681.92x = 205,021.62 × 43,187.67
  4. Step 4: Simplify right side
    136,681.92x = 8,854,406,067.43
  5. Step 5: Solve for x
    x = 8,854,406,067.43/136,681.92
  6. Step 6: Final answer
    x = 64,781.11

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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.