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Finding the Fourth Proportional to 104,758.32, 157,136.64 and 69,378

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Solution

The fourth proportional to 104,758.32, 157,136.64 and 69,378 is: 104,066.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,758.32 : 157,136.64 = 69,378 : x
  2. Step 2: Convert to fraction form
    104,758.32/157,136.64 = 69,378/x
  3. Step 3: Cross multiply
    104,758.32x = 157,136.64 × 69,378
  4. Step 4: Simplify right side
    104,758.32x = 10,901,825,809.92
  5. Step 5: Solve for x
    x = 10,901,825,809.92/104,758.32
  6. Step 6: Final answer
    x = 104,066.44

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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.