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Finding the Fourth Proportional to 65,244, 90,044.40 and 38,748

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Solution

The fourth proportional to 65,244, 90,044.40 and 38,748 is: 53,476.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,244 : 90,044.40 = 38,748 : x
  2. Step 2: Convert to fraction form
    65,244/90,044.40 = 38,748/x
  3. Step 3: Cross multiply
    65,244x = 90,044.40 × 38,748
  4. Step 4: Simplify right side
    65,244x = 3,489,040,411.20
  5. Step 5: Solve for x
    x = 3,489,040,411.20/65,244
  6. Step 6: Final answer
    x = 53,476.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.