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Finding the Fourth Proportional to 72,445.49, 108,656.57 and 19,842.67

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Solution

The fourth proportional to 72,445.49, 108,656.57 and 19,842.67 is: 29,760.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,445.49 : 108,656.57 = 19,842.67 : x
  2. Step 2: Convert to fraction form
    72,445.49/108,656.57 = 19,842.67/x
  3. Step 3: Cross multiply
    72,445.49x = 108,656.57 × 19,842.67
  4. Step 4: Simplify right side
    72,445.49x = 2,156,036,647.27
  5. Step 5: Solve for x
    x = 2,156,036,647.27/72,445.49
  6. Step 6: Final answer
    x = 29,760.81

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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.