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Finding the Fourth Proportional to 61,326.82, 91,990.28 and 19,210.57

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Solution

The fourth proportional to 61,326.82, 91,990.28 and 19,210.57 is: 28,815.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,326.82 : 91,990.28 = 19,210.57 : x
  2. Step 2: Convert to fraction form
    61,326.82/91,990.28 = 19,210.57/x
  3. Step 3: Cross multiply
    61,326.82x = 91,990.28 × 19,210.57
  4. Step 4: Simplify right side
    61,326.82x = 1,767,185,531.31
  5. Step 5: Solve for x
    x = 1,767,185,531.31/61,326.82
  6. Step 6: Final answer
    x = 28,815.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.