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Finding the Fourth Proportional to 102,921.30, 154,301.30 and 40,638.42

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Solution

The fourth proportional to 102,921.30, 154,301.30 and 40,638.42 is: 60,925.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,921.30 : 154,301.30 = 40,638.42 : x
  2. Step 2: Convert to fraction form
    102,921.30/154,301.30 = 40,638.42/x
  3. Step 3: Cross multiply
    102,921.30x = 154,301.30 × 40,638.42
  4. Step 4: Simplify right side
    102,921.30x = 6,270,561,035.95
  5. Step 5: Solve for x
    x = 6,270,561,035.95/102,921.30
  6. Step 6: Final answer
    x = 60,925.79

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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.