Home / 100,025.90-138,022.36-55,316.78

Finding the Fourth Proportional to 100,025.90, 138,022.36 and 55,316.78

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Solution

The fourth proportional to 100,025.90, 138,022.36 and 55,316.78 is: 76,329.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,025.90 : 138,022.36 = 55,316.78 : x
  2. Step 2: Convert to fraction form
    100,025.90/138,022.36 = 55,316.78/x
  3. Step 3: Cross multiply
    100,025.90x = 138,022.36 × 55,316.78
  4. Step 4: Simplify right side
    100,025.90x = 7,634,952,523.20
  5. Step 5: Solve for x
    x = 7,634,952,523.20/100,025.90
  6. Step 6: Final answer
    x = 76,329.76

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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.