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Finding the Fourth Proportional to 212,720.44, 319,061.20 and 64,976.44

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Solution

The fourth proportional to 212,720.44, 319,061.20 and 64,976.44 is: 97,458.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,720.44 : 319,061.20 = 64,976.44 : x
  2. Step 2: Convert to fraction form
    212,720.44/319,061.20 = 64,976.44/x
  3. Step 3: Cross multiply
    212,720.44x = 319,061.20 × 64,976.44
  4. Step 4: Simplify right side
    212,720.44x = 20,731,460,918.13
  5. Step 5: Solve for x
    x = 20,731,460,918.13/212,720.44
  6. Step 6: Final answer
    x = 97,458.72

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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.