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Finding the Fourth Proportional to 91,307.38, 136,772.38 and 53,751.73

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Solution

The fourth proportional to 91,307.38, 136,772.38 and 53,751.73 is: 80,516.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,307.38 : 136,772.38 = 53,751.73 : x
  2. Step 2: Convert to fraction form
    91,307.38/136,772.38 = 53,751.73/x
  3. Step 3: Cross multiply
    91,307.38x = 136,772.38 × 53,751.73
  4. Step 4: Simplify right side
    91,307.38x = 7,351,752,041.22
  5. Step 5: Solve for x
    x = 7,351,752,041.22/91,307.38
  6. Step 6: Final answer
    x = 80,516.52

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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.