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Finding the Fourth Proportional to 61,428.66, 84,824.19 and 38,806.98

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Solution

The fourth proportional to 61,428.66, 84,824.19 and 38,806.98 is: 53,586.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,428.66 : 84,824.19 = 38,806.98 : x
  2. Step 2: Convert to fraction form
    61,428.66/84,824.19 = 38,806.98/x
  3. Step 3: Cross multiply
    61,428.66x = 84,824.19 × 38,806.98
  4. Step 4: Simplify right side
    61,428.66x = 3,291,770,644.85
  5. Step 5: Solve for x
    x = 3,291,770,644.85/61,428.66
  6. Step 6: Final answer
    x = 53,586.89

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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.