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Finding the Fourth Proportional to 212,595.63, 318,942.65 and 72,354.25

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Solution

The fourth proportional to 212,595.63, 318,942.65 and 72,354.25 is: 108,548.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,595.63 : 318,942.65 = 72,354.25 : x
  2. Step 2: Convert to fraction form
    212,595.63/318,942.65 = 72,354.25/x
  3. Step 3: Cross multiply
    212,595.63x = 318,942.65 × 72,354.25
  4. Step 4: Simplify right side
    212,595.63x = 23,076,856,233.76
  5. Step 5: Solve for x
    x = 23,076,856,233.76/212,595.63
  6. Step 6: Final answer
    x = 108,548.12

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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.