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Finding the Fourth Proportional to 65,662.88, 98,496.48 and 21,290

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Solution

The fourth proportional to 65,662.88, 98,496.48 and 21,290 is: 31,935.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,662.88 : 98,496.48 = 21,290 : x
  2. Step 2: Convert to fraction form
    65,662.88/98,496.48 = 21,290/x
  3. Step 3: Cross multiply
    65,662.88x = 98,496.48 × 21,290
  4. Step 4: Simplify right side
    65,662.88x = 2,096,990,059.20
  5. Step 5: Solve for x
    x = 2,096,990,059.20/65,662.88
  6. Step 6: Final answer
    x = 31,935.70

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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.