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Finding the Fourth Proportional to 190,523.71, 285,785.64 and 70,621.89

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Solution

The fourth proportional to 190,523.71, 285,785.64 and 70,621.89 is: 105,932.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,523.71 : 285,785.64 = 70,621.89 : x
  2. Step 2: Convert to fraction form
    190,523.71/285,785.64 = 70,621.89/x
  3. Step 3: Cross multiply
    190,523.71x = 285,785.64 × 70,621.89
  4. Step 4: Simplify right side
    190,523.71x = 20,182,720,249.62
  5. Step 5: Solve for x
    x = 20,182,720,249.62/190,523.71
  6. Step 6: Final answer
    x = 105,932.85

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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.