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Finding the Fourth Proportional to 91,309.70, 136,977.51 and 28,134.95

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Solution

The fourth proportional to 91,309.70, 136,977.51 and 28,134.95 is: 42,206.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,309.70 : 136,977.51 = 28,134.95 : x
  2. Step 2: Convert to fraction form
    91,309.70/136,977.51 = 28,134.95/x
  3. Step 3: Cross multiply
    91,309.70x = 136,977.51 × 28,134.95
  4. Step 4: Simplify right side
    91,309.70x = 3,853,855,394.97
  5. Step 5: Solve for x
    x = 3,853,855,394.97/91,309.70
  6. Step 6: Final answer
    x = 42,206.42

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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.