Home / 158,685.08-218,962.44-90,691.25

Finding the Fourth Proportional to 158,685.08, 218,962.44 and 90,691.25

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Solution

The fourth proportional to 158,685.08, 218,962.44 and 90,691.25 is: 125,140.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,685.08 : 218,962.44 = 90,691.25 : x
  2. Step 2: Convert to fraction form
    158,685.08/218,962.44 = 90,691.25/x
  3. Step 3: Cross multiply
    158,685.08x = 218,962.44 × 90,691.25
  4. Step 4: Simplify right side
    158,685.08x = 19,857,976,291.84
  5. Step 5: Solve for x
    x = 19,857,976,291.84/158,685.08
  6. Step 6: Final answer
    x = 125,140.79

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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.