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Finding the Fourth Proportional to 139,872.96, 209,532.96 and 66,052.80

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Solution

The fourth proportional to 139,872.96, 209,532.96 and 66,052.80 is: 98,948.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,872.96 : 209,532.96 = 66,052.80 : x
  2. Step 2: Convert to fraction form
    139,872.96/209,532.96 = 66,052.80/x
  3. Step 3: Cross multiply
    139,872.96x = 209,532.96 × 66,052.80
  4. Step 4: Simplify right side
    139,872.96x = 13,840,238,700.29
  5. Step 5: Solve for x
    x = 13,840,238,700.29/139,872.96
  6. Step 6: Final answer
    x = 98,948.64

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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.