Home / 287,819.49-431,729.25-100,787.25

Finding the Fourth Proportional to 287,819.49, 431,729.25 and 100,787.25

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Solution

The fourth proportional to 287,819.49, 431,729.25 and 100,787.25 is: 151,180.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,819.49 : 431,729.25 = 100,787.25 : x
  2. Step 2: Convert to fraction form
    287,819.49/431,729.25 = 100,787.25/x
  3. Step 3: Cross multiply
    287,819.49x = 431,729.25 × 100,787.25
  4. Step 4: Simplify right side
    287,819.49x = 43,512,803,852.06
  5. Step 5: Solve for x
    x = 43,512,803,852.06/287,819.49
  6. Step 6: Final answer
    x = 151,180.88

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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.