Home / 100,205.02-138,278-54,883.20

Finding the Fourth Proportional to 100,205.02, 138,278 and 54,883.20

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Solution

The fourth proportional to 100,205.02, 138,278 and 54,883.20 is: 75,736.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,205.02 : 138,278 = 54,883.20 : x
  2. Step 2: Convert to fraction form
    100,205.02/138,278 = 54,883.20/x
  3. Step 3: Cross multiply
    100,205.02x = 138,278 × 54,883.20
  4. Step 4: Simplify right side
    100,205.02x = 7,589,139,129.60
  5. Step 5: Solve for x
    x = 7,589,139,129.60/100,205.02
  6. Step 6: Final answer
    x = 75,736.12

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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.