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Finding the Fourth Proportional to 61,382.46, 84,679.16 and 39,870.74

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Solution

The fourth proportional to 61,382.46, 84,679.16 and 39,870.74 is: 55,003.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,382.46 : 84,679.16 = 39,870.74 : x
  2. Step 2: Convert to fraction form
    61,382.46/84,679.16 = 39,870.74/x
  3. Step 3: Cross multiply
    61,382.46x = 84,679.16 × 39,870.74
  4. Step 4: Simplify right side
    61,382.46x = 3,376,220,771.78
  5. Step 5: Solve for x
    x = 3,376,220,771.78/61,382.46
  6. Step 6: Final answer
    x = 55,003.02

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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.