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Finding the Fourth Proportional to 61,147.80, 91,700.10 and 21,706.20

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Solution

The fourth proportional to 61,147.80, 91,700.10 and 21,706.20 is: 32,551.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,147.80 : 91,700.10 = 21,706.20 : x
  2. Step 2: Convert to fraction form
    61,147.80/91,700.10 = 21,706.20/x
  3. Step 3: Cross multiply
    61,147.80x = 91,700.10 × 21,706.20
  4. Step 4: Simplify right side
    61,147.80x = 1,990,460,710.62
  5. Step 5: Solve for x
    x = 1,990,460,710.62/61,147.80
  6. Step 6: Final answer
    x = 32,551.63

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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.