Home / 126,001.07-173,642.23-90,128.80

Finding the Fourth Proportional to 126,001.07, 173,642.23 and 90,128.80

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Solution

The fourth proportional to 126,001.07, 173,642.23 and 90,128.80 is: 124,206.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,001.07 : 173,642.23 = 90,128.80 : x
  2. Step 2: Convert to fraction form
    126,001.07/173,642.23 = 90,128.80/x
  3. Step 3: Cross multiply
    126,001.07x = 173,642.23 × 90,128.80
  4. Step 4: Simplify right side
    126,001.07x = 15,650,166,148.94
  5. Step 5: Solve for x
    x = 15,650,166,148.94/126,001.07
  6. Step 6: Final answer
    x = 124,206.61

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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.