Home / 100,404.12-138,291.62-74,828.67

Finding the Fourth Proportional to 100,404.12, 138,291.62 and 74,828.67

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Solution

The fourth proportional to 100,404.12, 138,291.62 and 74,828.67 is: 103,065.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,404.12 : 138,291.62 = 74,828.67 : x
  2. Step 2: Convert to fraction form
    100,404.12/138,291.62 = 74,828.67/x
  3. Step 3: Cross multiply
    100,404.12x = 138,291.62 × 74,828.67
  4. Step 4: Simplify right side
    100,404.12x = 10,348,177,622.60
  5. Step 5: Solve for x
    x = 10,348,177,622.60/100,404.12
  6. Step 6: Final answer
    x = 103,065.27

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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.