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Finding the Fourth Proportional to 65,221.80, 97,823.10 and 18,479.40

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Solution

The fourth proportional to 65,221.80, 97,823.10 and 18,479.40 is: 27,716.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,221.80 : 97,823.10 = 18,479.40 : x
  2. Step 2: Convert to fraction form
    65,221.80/97,823.10 = 18,479.40/x
  3. Step 3: Cross multiply
    65,221.80x = 97,823.10 × 18,479.40
  4. Step 4: Simplify right side
    65,221.80x = 1,807,712,194.14
  5. Step 5: Solve for x
    x = 1,807,712,194.14/65,221.80
  6. Step 6: Final answer
    x = 27,716.38

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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.