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Finding the Fourth Proportional to 61,378.74, 84,674.04 and 39,866.94

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Solution

The fourth proportional to 61,378.74, 84,674.04 and 39,866.94 is: 54,997.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,378.74 : 84,674.04 = 39,866.94 : x
  2. Step 2: Convert to fraction form
    61,378.74/84,674.04 = 39,866.94/x
  3. Step 3: Cross multiply
    61,378.74x = 84,674.04 × 39,866.94
  4. Step 4: Simplify right side
    61,378.74x = 3,375,694,872.24
  5. Step 5: Solve for x
    x = 3,375,694,872.24/61,378.74
  6. Step 6: Final answer
    x = 54,997.79

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1.5x scale

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.