Home / 158,439.06-218,642.13-86,815.62

Finding the Fourth Proportional to 158,439.06, 218,642.13 and 86,815.62

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Solution

The fourth proportional to 158,439.06, 218,642.13 and 86,815.62 is: 119,803.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,439.06 : 218,642.13 = 86,815.62 : x
  2. Step 2: Convert to fraction form
    158,439.06/218,642.13 = 86,815.62/x
  3. Step 3: Cross multiply
    158,439.06x = 218,642.13 × 86,815.62
  4. Step 4: Simplify right side
    158,439.06x = 18,981,552,074.07
  5. Step 5: Solve for x
    x = 18,981,552,074.07/158,439.06
  6. Step 6: Final answer
    x = 119,803.49

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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.