Home / 135,391.29-186,782.11-81,645.76

Finding the Fourth Proportional to 135,391.29, 186,782.11 and 81,645.76

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Solution

The fourth proportional to 135,391.29, 186,782.11 and 81,645.76 is: 112,636.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,391.29 : 186,782.11 = 81,645.76 : x
  2. Step 2: Convert to fraction form
    135,391.29/186,782.11 = 81,645.76/x
  3. Step 3: Cross multiply
    135,391.29x = 186,782.11 × 81,645.76
  4. Step 4: Simplify right side
    135,391.29x = 15,249,967,325.35
  5. Step 5: Solve for x
    x = 15,249,967,325.35/135,391.29
  6. Step 6: Final answer
    x = 112,636.25

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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.