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Finding the Fourth Proportional to 287,772.40, 431,620.80 and 88,112.80

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Solution

The fourth proportional to 287,772.40, 431,620.80 and 88,112.80 is: 132,157.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,772.40 : 431,620.80 = 88,112.80 : x
  2. Step 2: Convert to fraction form
    287,772.40/431,620.80 = 88,112.80/x
  3. Step 3: Cross multiply
    287,772.40x = 431,620.80 × 88,112.80
  4. Step 4: Simplify right side
    287,772.40x = 38,031,317,226.24
  5. Step 5: Solve for x
    x = 38,031,317,226.24/287,772.40
  6. Step 6: Final answer
    x = 132,157.63

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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.