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Finding the Fourth Proportional to 212,577.72, 318,853.62 and 87,915.48

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Solution

The fourth proportional to 212,577.72, 318,853.62 and 87,915.48 is: 131,867.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,577.72 : 318,853.62 = 87,915.48 : x
  2. Step 2: Convert to fraction form
    212,577.72/318,853.62 = 87,915.48/x
  3. Step 3: Cross multiply
    212,577.72x = 318,853.62 × 87,915.48
  4. Step 4: Simplify right side
    212,577.72x = 28,032,169,052.04
  5. Step 5: Solve for x
    x = 28,032,169,052.04/212,577.72
  6. Step 6: Final answer
    x = 131,867.86

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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.