Home / 111,387.87-153,723.41-63,640.19

Finding the Fourth Proportional to 111,387.87, 153,723.41 and 63,640.19

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Solution

The fourth proportional to 111,387.87, 153,723.41 and 63,640.19 is: 87,828.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,387.87 : 153,723.41 = 63,640.19 : x
  2. Step 2: Convert to fraction form
    111,387.87/153,723.41 = 63,640.19/x
  3. Step 3: Cross multiply
    111,387.87x = 153,723.41 × 63,640.19
  4. Step 4: Simplify right side
    111,387.87x = 9,782,985,933.03
  5. Step 5: Solve for x
    x = 9,782,985,933.03/111,387.87
  6. Step 6: Final answer
    x = 87,828.11

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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.