Home / 100,099.35-138,127.70-67,768.20

Finding the Fourth Proportional to 100,099.35, 138,127.70 and 67,768.20

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Solution

The fourth proportional to 100,099.35, 138,127.70 and 67,768.20 is: 93,513.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,099.35 : 138,127.70 = 67,768.20 : x
  2. Step 2: Convert to fraction form
    100,099.35/138,127.70 = 67,768.20/x
  3. Step 3: Cross multiply
    100,099.35x = 138,127.70 × 67,768.20
  4. Step 4: Simplify right side
    100,099.35x = 9,360,665,771.80
  5. Step 5: Solve for x
    x = 9,360,665,771.80/100,099.35
  6. Step 6: Final answer
    x = 93,513.75

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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.