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Finding the Fourth Proportional to 61,378.23, 84,673.35 and 39,866.45

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Solution

The fourth proportional to 61,378.23, 84,673.35 and 39,866.45 is: 54,997.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,378.23 : 84,673.35 = 39,866.45 : x
  2. Step 2: Convert to fraction form
    61,378.23/84,673.35 = 39,866.45/x
  3. Step 3: Cross multiply
    61,378.23x = 84,673.35 × 39,866.45
  4. Step 4: Simplify right side
    61,378.23x = 3,375,625,450.74
  5. Step 5: Solve for x
    x = 3,375,625,450.74/61,378.23
  6. Step 6: Final answer
    x = 54,997.11

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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.