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Finding the Fourth Proportional to 65,871.81, 98,820.45 and 21,486.63

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Solution

The fourth proportional to 65,871.81, 98,820.45 and 21,486.63 is: 32,234.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,871.81 : 98,820.45 = 21,486.63 : x
  2. Step 2: Convert to fraction form
    65,871.81/98,820.45 = 21,486.63/x
  3. Step 3: Cross multiply
    65,871.81x = 98,820.45 × 21,486.63
  4. Step 4: Simplify right side
    65,871.81x = 2,123,318,445.58
  5. Step 5: Solve for x
    x = 2,123,318,445.58/65,871.81
  6. Step 6: Final answer
    x = 32,234.10

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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.