Home / 109,145.40-150,619.05-61,398.78

Finding the Fourth Proportional to 109,145.40, 150,619.05 and 61,398.78

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Solution

The fourth proportional to 109,145.40, 150,619.05 and 61,398.78 is: 84,729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,145.40 : 150,619.05 = 61,398.78 : x
  2. Step 2: Convert to fraction form
    109,145.40/150,619.05 = 61,398.78/x
  3. Step 3: Cross multiply
    109,145.40x = 150,619.05 × 61,398.78
  4. Step 4: Simplify right side
    109,145.40x = 9,247,825,914.76
  5. Step 5: Solve for x
    x = 9,247,825,914.76/109,145.40
  6. Step 6: Final answer
    x = 84,729.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.