Home / 91,389.19-126,128.82-51,105.20

Finding the Fourth Proportional to 91,389.19, 126,128.82 and 51,105.20

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Solution

The fourth proportional to 91,389.19, 126,128.82 and 51,105.20 is: 70,531.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,389.19 : 126,128.82 = 51,105.20 : x
  2. Step 2: Convert to fraction form
    91,389.19/126,128.82 = 51,105.20/x
  3. Step 3: Cross multiply
    91,389.19x = 126,128.82 × 51,105.20
  4. Step 4: Simplify right side
    91,389.19x = 6,445,839,053.34
  5. Step 5: Solve for x
    x = 6,445,839,053.34/91,389.19
  6. Step 6: Final answer
    x = 70,531.75

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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.