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Finding the Fourth Proportional to 65,868.80, 98,818.92 and 21,495.64

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Solution

The fourth proportional to 65,868.80, 98,818.92 and 21,495.64 is: 32,248.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,868.80 : 98,818.92 = 21,495.64 : x
  2. Step 2: Convert to fraction form
    65,868.80/98,818.92 = 21,495.64/x
  3. Step 3: Cross multiply
    65,868.80x = 98,818.92 × 21,495.64
  4. Step 4: Simplify right side
    65,868.80x = 2,124,175,682.46
  5. Step 5: Solve for x
    x = 2,124,175,682.46/65,868.80
  6. Step 6: Final answer
    x = 32,248.59

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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.