Home / 212,815.59-319,230.08-79,670.42

Finding the Fourth Proportional to 212,815.59, 319,230.08 and 79,670.42

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Solution

The fourth proportional to 212,815.59, 319,230.08 and 79,670.42 is: 119,508.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,815.59 : 319,230.08 = 79,670.42 : x
  2. Step 2: Convert to fraction form
    212,815.59/319,230.08 = 79,670.42/x
  3. Step 3: Cross multiply
    212,815.59x = 319,230.08 × 79,670.42
  4. Step 4: Simplify right side
    212,815.59x = 25,433,194,051.61
  5. Step 5: Solve for x
    x = 25,433,194,051.61/212,815.59
  6. Step 6: Final answer
    x = 119,508.14

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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.