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Finding the Fourth Proportional to 136,483.42, 188,387.67 and 86,215.90

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Solution

The fourth proportional to 136,483.42, 188,387.67 and 86,215.90 is: 119,003.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,483.42 : 188,387.67 = 86,215.90 : x
  2. Step 2: Convert to fraction form
    136,483.42/188,387.67 = 86,215.90/x
  3. Step 3: Cross multiply
    136,483.42x = 188,387.67 × 86,215.90
  4. Step 4: Simplify right side
    136,483.42x = 16,242,012,517.95
  5. Step 5: Solve for x
    x = 16,242,012,517.95/136,483.42
  6. Step 6: Final answer
    x = 119,003.56

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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.