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Finding the Fourth Proportional to 212,514.88, 318,781.12 and 62,755.20

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Solution

The fourth proportional to 212,514.88, 318,781.12 and 62,755.20 is: 94,135.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,514.88 : 318,781.12 = 62,755.20 : x
  2. Step 2: Convert to fraction form
    212,514.88/318,781.12 = 62,755.20/x
  3. Step 3: Cross multiply
    212,514.88x = 318,781.12 × 62,755.20
  4. Step 4: Simplify right side
    212,514.88x = 20,005,172,941.82
  5. Step 5: Solve for x
    x = 20,005,172,941.82/212,514.88
  6. Step 6: Final answer
    x = 94,135.40

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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.