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Finding the Fourth Proportional to 65,661.96, 98,493.30 and 18,915.96

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Solution

The fourth proportional to 65,661.96, 98,493.30 and 18,915.96 is: 28,374.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,661.96 : 98,493.30 = 18,915.96 : x
  2. Step 2: Convert to fraction form
    65,661.96/98,493.30 = 18,915.96/x
  3. Step 3: Cross multiply
    65,661.96x = 98,493.30 × 18,915.96
  4. Step 4: Simplify right side
    65,661.96x = 1,863,095,323.07
  5. Step 5: Solve for x
    x = 1,863,095,323.07/65,661.96
  6. Step 6: Final answer
    x = 28,374.04

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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.