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Finding the Fourth Proportional to 158,155.52, 218,257.36 and 86,541.80

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Solution

The fourth proportional to 158,155.52, 218,257.36 and 86,541.80 is: 119,429.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,155.52 : 218,257.36 = 86,541.80 : x
  2. Step 2: Convert to fraction form
    158,155.52/218,257.36 = 86,541.80/x
  3. Step 3: Cross multiply
    158,155.52x = 218,257.36 × 86,541.80
  4. Step 4: Simplify right side
    158,155.52x = 18,888,384,797.65
  5. Step 5: Solve for x
    x = 18,888,384,797.65/158,155.52
  6. Step 6: Final answer
    x = 119,429.18

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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.