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Finding the Fourth Proportional to 61,143.84, 91,608.48 and 43,521.84

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Solution

The fourth proportional to 61,143.84, 91,608.48 and 43,521.84 is: 65,206.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,143.84 : 91,608.48 = 43,521.84 : x
  2. Step 2: Convert to fraction form
    61,143.84/91,608.48 = 43,521.84/x
  3. Step 3: Cross multiply
    61,143.84x = 91,608.48 × 43,521.84
  4. Step 4: Simplify right side
    61,143.84x = 3,986,969,609.20
  5. Step 5: Solve for x
    x = 3,986,969,609.20/61,143.84
  6. Step 6: Final answer
    x = 65,206.40

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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.