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Finding the Fourth Proportional to 61,070.48, 91,605.92 and 21,628.74

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Solution

The fourth proportional to 61,070.48, 91,605.92 and 21,628.74 is: 32,443.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,070.48 : 91,605.92 = 21,628.74 : x
  2. Step 2: Convert to fraction form
    61,070.48/91,605.92 = 21,628.74/x
  3. Step 3: Cross multiply
    61,070.48x = 91,605.92 × 21,628.74
  4. Step 4: Simplify right side
    61,070.48x = 1,981,320,626.14
  5. Step 5: Solve for x
    x = 1,981,320,626.14/61,070.48
  6. Step 6: Final answer
    x = 32,443.18

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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.