Home / 212,972.10-319,496.40-72,697.92

Finding the Fourth Proportional to 212,972.10, 319,496.40 and 72,697.92

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Solution

The fourth proportional to 212,972.10, 319,496.40 and 72,697.92 is: 109,059.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,972.10 : 319,496.40 = 72,697.92 : x
  2. Step 2: Convert to fraction form
    212,972.10/319,496.40 = 72,697.92/x
  3. Step 3: Cross multiply
    212,972.10x = 319,496.40 × 72,697.92
  4. Step 4: Simplify right side
    212,972.10x = 23,226,723,727.49
  5. Step 5: Solve for x
    x = 23,226,723,727.49/212,972.10
  6. Step 6: Final answer
    x = 109,059.94

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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.