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Finding the Fourth Proportional to 65,660.22, 98,507.25 and 18,916.74

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Solution

The fourth proportional to 65,660.22, 98,507.25 and 18,916.74 is: 28,379.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,660.22 : 98,507.25 = 18,916.74 : x
  2. Step 2: Convert to fraction form
    65,660.22/98,507.25 = 18,916.74/x
  3. Step 3: Cross multiply
    65,660.22x = 98,507.25 × 18,916.74
  4. Step 4: Simplify right side
    65,660.22x = 1,863,436,036.37
  5. Step 5: Solve for x
    x = 1,863,436,036.37/65,660.22
  6. Step 6: Final answer
    x = 28,379.98

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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.