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Finding the Fourth Proportional to 90,952.98, 136,422.81 and 28,641.30

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Solution

The fourth proportional to 90,952.98, 136,422.81 and 28,641.30 is: 42,959.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,952.98 : 136,422.81 = 28,641.30 : x
  2. Step 2: Convert to fraction form
    90,952.98/136,422.81 = 28,641.30/x
  3. Step 3: Cross multiply
    90,952.98x = 136,422.81 × 28,641.30
  4. Step 4: Simplify right side
    90,952.98x = 3,907,326,628.05
  5. Step 5: Solve for x
    x = 3,907,326,628.05/90,952.98
  6. Step 6: Final answer
    x = 42,959.85

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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.