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Finding the Fourth Proportional to 212,750.88, 319,181.52 and 79,641.60

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Solution

The fourth proportional to 212,750.88, 319,181.52 and 79,641.60 is: 119,483.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,750.88 : 319,181.52 = 79,641.60 : x
  2. Step 2: Convert to fraction form
    212,750.88/319,181.52 = 79,641.60/x
  3. Step 3: Cross multiply
    212,750.88x = 319,181.52 × 79,641.60
  4. Step 4: Simplify right side
    212,750.88x = 25,420,126,943.23
  5. Step 5: Solve for x
    x = 25,420,126,943.23/212,750.88
  6. Step 6: Final answer
    x = 119,483.06

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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.