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Finding the Fourth Proportional to 151,326.43, 208,811.12 and 90,907.82

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Solution

The fourth proportional to 151,326.43, 208,811.12 and 90,907.82 is: 125,441.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,326.43 : 208,811.12 = 90,907.82 : x
  2. Step 2: Convert to fraction form
    151,326.43/208,811.12 = 90,907.82/x
  3. Step 3: Cross multiply
    151,326.43x = 208,811.12 × 90,907.82
  4. Step 4: Simplify right side
    151,326.43x = 18,982,562,995.41
  5. Step 5: Solve for x
    x = 18,982,562,995.41/151,326.43
  6. Step 6: Final answer
    x = 125,441.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.