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Finding the Fourth Proportional to 154,691.56, 213,487.41 and 86,707.45

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Solution

The fourth proportional to 154,691.56, 213,487.41 and 86,707.45 is: 119,663.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,691.56 : 213,487.41 = 86,707.45 : x
  2. Step 2: Convert to fraction form
    154,691.56/213,487.41 = 86,707.45/x
  3. Step 3: Cross multiply
    154,691.56x = 213,487.41 × 86,707.45
  4. Step 4: Simplify right side
    154,691.56x = 18,510,948,928.20
  5. Step 5: Solve for x
    x = 18,510,948,928.20/154,691.56
  6. Step 6: Final answer
    x = 119,663.60

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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.