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Finding the Fourth Proportional to 218,889.12, 302,028.24 and 123,395.80

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Solution

The fourth proportional to 218,889.12, 302,028.24 and 123,395.80 is: 170,264.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,889.12 : 302,028.24 = 123,395.80 : x
  2. Step 2: Convert to fraction form
    218,889.12/302,028.24 = 123,395.80/x
  3. Step 3: Cross multiply
    218,889.12x = 302,028.24 × 123,395.80
  4. Step 4: Simplify right side
    218,889.12x = 37,269,016,297.39
  5. Step 5: Solve for x
    x = 37,269,016,297.39/218,889.12
  6. Step 6: Final answer
    x = 170,264.36

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1.5x scale

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.