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Finding the Fourth Proportional to 212,748, 319,176.68 and 79,630.17

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Solution

The fourth proportional to 212,748, 319,176.68 and 79,630.17 is: 119,465.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,748 : 319,176.68 = 79,630.17 : x
  2. Step 2: Convert to fraction form
    212,748/319,176.68 = 79,630.17/x
  3. Step 3: Cross multiply
    212,748x = 319,176.68 × 79,630.17
  4. Step 4: Simplify right side
    212,748x = 25,416,093,288.44
  5. Step 5: Solve for x
    x = 25,416,093,288.44/212,748
  6. Step 6: Final answer
    x = 119,465.72

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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.