Home / 158,140.31-218,231.75-86,519.54

Finding the Fourth Proportional to 158,140.31, 218,231.75 and 86,519.54

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Solution

The fourth proportional to 158,140.31, 218,231.75 and 86,519.54 is: 119,395.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,140.31 : 218,231.75 = 86,519.54 : x
  2. Step 2: Convert to fraction form
    158,140.31/218,231.75 = 86,519.54/x
  3. Step 3: Cross multiply
    158,140.31x = 218,231.75 × 86,519.54
  4. Step 4: Simplify right side
    158,140.31x = 18,881,311,385.27
  5. Step 5: Solve for x
    x = 18,881,311,385.27/158,140.31
  6. Step 6: Final answer
    x = 119,395.95

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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.