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Finding the Fourth Proportional to 253,138.95, 379,708.79 and 103,379.24

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Solution

The fourth proportional to 253,138.95, 379,708.79 and 103,379.24 is: 155,069.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,138.95 : 379,708.79 = 103,379.24 : x
  2. Step 2: Convert to fraction form
    253,138.95/379,708.79 = 103,379.24/x
  3. Step 3: Cross multiply
    253,138.95x = 379,708.79 × 103,379.24
  4. Step 4: Simplify right side
    253,138.95x = 39,254,007,339.24
  5. Step 5: Solve for x
    x = 39,254,007,339.24/253,138.95
  6. Step 6: Final answer
    x = 155,069.01

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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.