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Finding the Fourth Proportional to 65,876.66, 90,909.17 and 35,661.21

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Solution

The fourth proportional to 65,876.66, 90,909.17 and 35,661.21 is: 49,212.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,876.66 : 90,909.17 = 35,661.21 : x
  2. Step 2: Convert to fraction form
    65,876.66/90,909.17 = 35,661.21/x
  3. Step 3: Cross multiply
    65,876.66x = 90,909.17 × 35,661.21
  4. Step 4: Simplify right side
    65,876.66x = 3,241,931,002.30
  5. Step 5: Solve for x
    x = 3,241,931,002.30/65,876.66
  6. Step 6: Final answer
    x = 49,212.13

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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.