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Finding the Fourth Proportional to 61,516.80, 84,891.78 and 37,643.40

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Solution

The fourth proportional to 61,516.80, 84,891.78 and 37,643.40 is: 51,947.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,516.80 : 84,891.78 = 37,643.40 : x
  2. Step 2: Convert to fraction form
    61,516.80/84,891.78 = 37,643.40/x
  3. Step 3: Cross multiply
    61,516.80x = 84,891.78 × 37,643.40
  4. Step 4: Simplify right side
    61,516.80x = 3,195,615,231.25
  5. Step 5: Solve for x
    x = 3,195,615,231.25/61,516.80
  6. Step 6: Final answer
    x = 51,947.03

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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.