Home / 100,239.02-138,328.68-54,297.80

Finding the Fourth Proportional to 100,239.02, 138,328.68 and 54,297.80

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Solution

The fourth proportional to 100,239.02, 138,328.68 and 54,297.80 is: 74,930.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,239.02 : 138,328.68 = 54,297.80 : x
  2. Step 2: Convert to fraction form
    100,239.02/138,328.68 = 54,297.80/x
  3. Step 3: Cross multiply
    100,239.02x = 138,328.68 × 54,297.80
  4. Step 4: Simplify right side
    100,239.02x = 7,510,942,346.43
  5. Step 5: Solve for x
    x = 7,510,942,346.43/100,239.02
  6. Step 6: Final answer
    x = 74,930.33

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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.