Home / 100,320.43-138,419.44-68,059.45

Finding the Fourth Proportional to 100,320.43, 138,419.44 and 68,059.45

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Solution

The fourth proportional to 100,320.43, 138,419.44 and 68,059.45 is: 93,906.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,320.43 : 138,419.44 = 68,059.45 : x
  2. Step 2: Convert to fraction form
    100,320.43/138,419.44 = 68,059.45/x
  3. Step 3: Cross multiply
    100,320.43x = 138,419.44 × 68,059.45
  4. Step 4: Simplify right side
    100,320.43x = 9,420,750,955.71
  5. Step 5: Solve for x
    x = 9,420,750,955.71/100,320.43
  6. Step 6: Final answer
    x = 93,906.60

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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.