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Finding the Fourth Proportional to 212,551, 318,845.12 and 54,779.20

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Solution

The fourth proportional to 212,551, 318,845.12 and 54,779.20 is: 82,173.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,551 : 318,845.12 = 54,779.20 : x
  2. Step 2: Convert to fraction form
    212,551/318,845.12 = 54,779.20/x
  3. Step 3: Cross multiply
    212,551x = 318,845.12 × 54,779.20
  4. Step 4: Simplify right side
    212,551x = 17,466,080,597.50
  5. Step 5: Solve for x
    x = 17,466,080,597.50/212,551
  6. Step 6: Final answer
    x = 82,173.60

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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.