Home / 90,565,441.32-135,593,055.72-81,382,140.84

Finding the Fourth Proportional to 90,565,441.32, 135,593,055.72 and 81,382,140.84

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Solution

The fourth proportional to 90,565,441.32, 135,593,055.72 and 81,382,140.84 is: 121,843,972.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,565,441.32 : 135,593,055.72 = 81,382,140.84 : x
  2. Step 2: Convert to fraction form
    90,565,441.32/135,593,055.72 = 81,382,140.84/x
  3. Step 3: Cross multiply
    90,565,441.32x = 135,593,055.72 × 81,382,140.84
  4. Step 4: Simplify right side
    90,565,441.32x = 11,034,853,157,531,008
  5. Step 5: Solve for x
    x = 11,034,853,157,531,008/90,565,441.32
  6. Step 6: Final answer
    x = 121,843,972.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.