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Finding the Fourth Proportional to 212,800.56, 319,207.52 and 79,655.39

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Solution

The fourth proportional to 212,800.56, 319,207.52 and 79,655.39 is: 119,485.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,800.56 : 319,207.52 = 79,655.39 : x
  2. Step 2: Convert to fraction form
    212,800.56/319,207.52 = 79,655.39/x
  3. Step 3: Cross multiply
    212,800.56x = 319,207.52 × 79,655.39
  4. Step 4: Simplify right side
    212,800.56x = 25,426,599,496.53
  5. Step 5: Solve for x
    x = 25,426,599,496.53/212,800.56
  6. Step 6: Final answer
    x = 119,485.59

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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.