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Finding the Fourth Proportional to 251,412.87, 377,020.47 and 91,450.83

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Solution

The fourth proportional to 251,412.87, 377,020.47 and 91,450.83 is: 137,140.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,412.87 : 377,020.47 = 91,450.83 : x
  2. Step 2: Convert to fraction form
    251,412.87/377,020.47 = 91,450.83/x
  3. Step 3: Cross multiply
    251,412.87x = 377,020.47 × 91,450.83
  4. Step 4: Simplify right side
    251,412.87x = 34,478,833,023.39
  5. Step 5: Solve for x
    x = 34,478,833,023.39/251,412.87
  6. Step 6: Final answer
    x = 137,140.29

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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.