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Finding the Fourth Proportional to 65,862.92, 98,810.15 and 21,489.75

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Solution

The fourth proportional to 65,862.92, 98,810.15 and 21,489.75 is: 32,239.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,862.92 : 98,810.15 = 21,489.75 : x
  2. Step 2: Convert to fraction form
    65,862.92/98,810.15 = 21,489.75/x
  3. Step 3: Cross multiply
    65,862.92x = 98,810.15 × 21,489.75
  4. Step 4: Simplify right side
    65,862.92x = 2,123,405,313.51
  5. Step 5: Solve for x
    x = 2,123,405,313.51/65,862.92
  6. Step 6: Final answer
    x = 32,239.77

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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.