Home / 91,400.88-126,104.52-51,109.20

Finding the Fourth Proportional to 91,400.88, 126,104.52 and 51,109.20

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Solution

The fourth proportional to 91,400.88, 126,104.52 and 51,109.20 is: 70,514.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,400.88 : 126,104.52 = 51,109.20 : x
  2. Step 2: Convert to fraction form
    91,400.88/126,104.52 = 51,109.20/x
  3. Step 3: Cross multiply
    91,400.88x = 126,104.52 × 51,109.20
  4. Step 4: Simplify right side
    91,400.88x = 6,445,101,133.58
  5. Step 5: Solve for x
    x = 6,445,101,133.58/91,400.88
  6. Step 6: Final answer
    x = 70,514.65

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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.