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Finding the Fourth Proportional to 61,086.25, 91,606.90 and 21,095.06

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Solution

The fourth proportional to 61,086.25, 91,606.90 and 21,095.06 is: 31,634.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,086.25 : 91,606.90 = 21,095.06 : x
  2. Step 2: Convert to fraction form
    61,086.25/91,606.90 = 21,095.06/x
  3. Step 3: Cross multiply
    61,086.25x = 91,606.90 × 21,095.06
  4. Step 4: Simplify right side
    61,086.25x = 1,932,452,838.34
  5. Step 5: Solve for x
    x = 1,932,452,838.34/61,086.25
  6. Step 6: Final answer
    x = 31,634.82

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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.