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Finding the Fourth Proportional to 61,243.82, 91,878.84 and 21,264.05

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Solution

The fourth proportional to 61,243.82, 91,878.84 and 21,264.05 is: 31,900.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,243.82 : 91,878.84 = 21,264.05 : x
  2. Step 2: Convert to fraction form
    61,243.82/91,878.84 = 21,264.05/x
  3. Step 3: Cross multiply
    61,243.82x = 91,878.84 × 21,264.05
  4. Step 4: Simplify right side
    61,243.82x = 1,953,715,681.99
  5. Step 5: Solve for x
    x = 1,953,715,681.99/61,243.82
  6. Step 6: Final answer
    x = 31,900.62

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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.