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Finding the Fourth Proportional to 61,368.32, 84,646.63 and 39,819.56

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Solution

The fourth proportional to 61,368.32, 84,646.63 and 39,819.56 is: 54,923.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,368.32 : 84,646.63 = 39,819.56 : x
  2. Step 2: Convert to fraction form
    61,368.32/84,646.63 = 39,819.56/x
  3. Step 3: Cross multiply
    61,368.32x = 84,646.63 × 39,819.56
  4. Step 4: Simplify right side
    61,368.32x = 3,370,591,562.08
  5. Step 5: Solve for x
    x = 3,370,591,562.08/61,368.32
  6. Step 6: Final answer
    x = 54,923.97

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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.