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Finding the Fourth Proportional to 212,553, 318,848.12 and 54,781.20

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Solution

The fourth proportional to 212,553, 318,848.12 and 54,781.20 is: 82,176.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,553 : 318,848.12 = 54,781.20 : x
  2. Step 2: Convert to fraction form
    212,553/318,848.12 = 54,781.20/x
  3. Step 3: Cross multiply
    212,553x = 318,848.12 × 54,781.20
  4. Step 4: Simplify right side
    212,553x = 17,466,882,631.34
  5. Step 5: Solve for x
    x = 17,466,882,631.34/212,553
  6. Step 6: Final answer
    x = 82,176.60

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1.5x scale

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.