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Finding the Fourth Proportional to 65,618.99, 98,444.15 and 21,245.78

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Solution

The fourth proportional to 65,618.99, 98,444.15 and 21,245.78 is: 31,873.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,618.99 : 98,444.15 = 21,245.78 : x
  2. Step 2: Convert to fraction form
    65,618.99/98,444.15 = 21,245.78/x
  3. Step 3: Cross multiply
    65,618.99x = 98,444.15 × 21,245.78
  4. Step 4: Simplify right side
    65,618.99x = 2,091,523,052.41
  5. Step 5: Solve for x
    x = 2,091,523,052.41/65,618.99
  6. Step 6: Final answer
    x = 31,873.75

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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.