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Finding the Fourth Proportional to 230,427.80, 345,641.70 and 72,672.20

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Solution

The fourth proportional to 230,427.80, 345,641.70 and 72,672.20 is: 109,008.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,427.80 : 345,641.70 = 72,672.20 : x
  2. Step 2: Convert to fraction form
    230,427.80/345,641.70 = 72,672.20/x
  3. Step 3: Cross multiply
    230,427.80x = 345,641.70 × 72,672.20
  4. Step 4: Simplify right side
    230,427.80x = 25,118,542,750.74
  5. Step 5: Solve for x
    x = 25,118,542,750.74/230,427.80
  6. Step 6: Final answer
    x = 109,008.30

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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.