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Finding the Fourth Proportional to 61,112.65, 91,619.64 and 21,648.24

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Solution

The fourth proportional to 61,112.65, 91,619.64 and 21,648.24 is: 32,454.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,112.65 : 91,619.64 = 21,648.24 : x
  2. Step 2: Convert to fraction form
    61,112.65/91,619.64 = 21,648.24/x
  3. Step 3: Cross multiply
    61,112.65x = 91,619.64 × 21,648.24
  4. Step 4: Simplify right side
    61,112.65x = 1,983,403,955.43
  5. Step 5: Solve for x
    x = 1,983,403,955.43/61,112.65
  6. Step 6: Final answer
    x = 32,454.88

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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.