Home / 126,150.12-174,022.02-78,385.32

Finding the Fourth Proportional to 126,150.12, 174,022.02 and 78,385.32

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Solution

The fourth proportional to 126,150.12, 174,022.02 and 78,385.32 is: 108,131.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,150.12 : 174,022.02 = 78,385.32 : x
  2. Step 2: Convert to fraction form
    126,150.12/174,022.02 = 78,385.32/x
  3. Step 3: Cross multiply
    126,150.12x = 174,022.02 × 78,385.32
  4. Step 4: Simplify right side
    126,150.12x = 13,640,771,724.75
  5. Step 5: Solve for x
    x = 13,640,771,724.75/126,150.12
  6. Step 6: Final answer
    x = 108,131.26

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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.