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Finding the Fourth Proportional to 61,145.66, 91,727.61 and 21,699.47

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Solution

The fourth proportional to 61,145.66, 91,727.61 and 21,699.47 is: 32,552.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,145.66 : 91,727.61 = 21,699.47 : x
  2. Step 2: Convert to fraction form
    61,145.66/91,727.61 = 21,699.47/x
  3. Step 3: Cross multiply
    61,145.66x = 91,727.61 × 21,699.47
  4. Step 4: Simplify right side
    61,145.66x = 1,990,440,669.31
  5. Step 5: Solve for x
    x = 1,990,440,669.31/61,145.66
  6. Step 6: Final answer
    x = 32,552.44

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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.