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Finding the Fourth Proportional to 65,645.88, 98,469.96 and 20,666.13

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Solution

The fourth proportional to 65,645.88, 98,469.96 and 20,666.13 is: 30,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,645.88 : 98,469.96 = 20,666.13 : x
  2. Step 2: Convert to fraction form
    65,645.88/98,469.96 = 20,666.13/x
  3. Step 3: Cross multiply
    65,645.88x = 98,469.96 × 20,666.13
  4. Step 4: Simplify right side
    65,645.88x = 2,034,992,994.45
  5. Step 5: Solve for x
    x = 2,034,992,994.45/65,645.88
  6. Step 6: Final answer
    x = 30,999.55

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1.5x scale

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.