Home / 115,386.12-159,208.13-86,736.42

Finding the Fourth Proportional to 115,386.12, 159,208.13 and 86,736.42

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Solution

The fourth proportional to 115,386.12, 159,208.13 and 86,736.42 is: 119,677.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,386.12 : 159,208.13 = 86,736.42 : x
  2. Step 2: Convert to fraction form
    115,386.12/159,208.13 = 86,736.42/x
  3. Step 3: Cross multiply
    115,386.12x = 159,208.13 × 86,736.42
  4. Step 4: Simplify right side
    115,386.12x = 13,809,143,447.94
  5. Step 5: Solve for x
    x = 13,809,143,447.94/115,386.12
  6. Step 6: Final answer
    x = 119,677.68

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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.