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Finding the Fourth Proportional to 61,206.74, 91,810.10 and 21,765.42

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Solution

The fourth proportional to 61,206.74, 91,810.10 and 21,765.42 is: 32,648.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,206.74 : 91,810.10 = 21,765.42 : x
  2. Step 2: Convert to fraction form
    61,206.74/91,810.10 = 21,765.42/x
  3. Step 3: Cross multiply
    61,206.74x = 91,810.10 × 21,765.42
  4. Step 4: Simplify right side
    61,206.74x = 1,998,285,386.74
  5. Step 5: Solve for x
    x = 1,998,285,386.74/61,206.74
  6. Step 6: Final answer
    x = 32,648.13

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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.