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Finding the Fourth Proportional to 212,335.84, 318,493.32 and 79,205.86

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Solution

The fourth proportional to 212,335.84, 318,493.32 and 79,205.86 is: 118,804.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,335.84 : 318,493.32 = 79,205.86 : x
  2. Step 2: Convert to fraction form
    212,335.84/318,493.32 = 79,205.86/x
  3. Step 3: Cross multiply
    212,335.84x = 318,493.32 × 79,205.86
  4. Step 4: Simplify right side
    212,335.84x = 25,226,537,314.86
  5. Step 5: Solve for x
    x = 25,226,537,314.86/212,335.84
  6. Step 6: Final answer
    x = 118,804.90

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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.