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Finding the Fourth Proportional to 91,307.70, 136,974.51 and 28,132.95

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Solution

The fourth proportional to 91,307.70, 136,974.51 and 28,132.95 is: 42,203.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,307.70 : 136,974.51 = 28,132.95 : x
  2. Step 2: Convert to fraction form
    91,307.70/136,974.51 = 28,132.95/x
  3. Step 3: Cross multiply
    91,307.70x = 136,974.51 × 28,132.95
  4. Step 4: Simplify right side
    91,307.70x = 3,853,497,041.10
  5. Step 5: Solve for x
    x = 3,853,497,041.10/91,307.70
  6. Step 6: Final answer
    x = 42,203.42

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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.