Home / 123,486.39-170,419.75-75,107.22

Finding the Fourth Proportional to 123,486.39, 170,419.75 and 75,107.22

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Solution

The fourth proportional to 123,486.39, 170,419.75 and 75,107.22 is: 103,653.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,486.39 : 170,419.75 = 75,107.22 : x
  2. Step 2: Convert to fraction form
    123,486.39/170,419.75 = 75,107.22/x
  3. Step 3: Cross multiply
    123,486.39x = 170,419.75 × 75,107.22
  4. Step 4: Simplify right side
    123,486.39x = 12,799,752,828.75
  5. Step 5: Solve for x
    x = 12,799,752,828.75/123,486.39
  6. Step 6: Final answer
    x = 103,653.15

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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.