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Finding the Fourth Proportional to 70,002.31, 105,008.73 and 20,082.01

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Solution

The fourth proportional to 70,002.31, 105,008.73 and 20,082.01 is: 30,124.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,002.31 : 105,008.73 = 20,082.01 : x
  2. Step 2: Convert to fraction form
    70,002.31/105,008.73 = 20,082.01/x
  3. Step 3: Cross multiply
    70,002.31x = 105,008.73 × 20,082.01
  4. Step 4: Simplify right side
    70,002.31x = 2,108,786,365.95
  5. Step 5: Solve for x
    x = 2,108,786,365.95/70,002.31
  6. Step 6: Final answer
    x = 30,124.53

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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.