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Finding the Fourth Proportional to 91,308.70, 136,976.01 and 28,133.95

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Solution

The fourth proportional to 91,308.70, 136,976.01 and 28,133.95 is: 42,204.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,308.70 : 136,976.01 = 28,133.95 : x
  2. Step 2: Convert to fraction form
    91,308.70/136,976.01 = 28,133.95/x
  3. Step 3: Cross multiply
    91,308.70x = 136,976.01 × 28,133.95
  4. Step 4: Simplify right side
    91,308.70x = 3,853,676,216.54
  5. Step 5: Solve for x
    x = 3,853,676,216.54/91,308.70
  6. Step 6: Final answer
    x = 42,204.92

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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.