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Finding the Fourth Proportional to 90,698.91, 124,834.14 and 79,872.90

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Solution

The fourth proportional to 90,698.91, 124,834.14 and 79,872.90 is: 109,933.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,698.91 : 124,834.14 = 79,872.90 : x
  2. Step 2: Convert to fraction form
    90,698.91/124,834.14 = 79,872.90/x
  3. Step 3: Cross multiply
    90,698.91x = 124,834.14 × 79,872.90
  4. Step 4: Simplify right side
    90,698.91x = 9,970,864,780.81
  5. Step 5: Solve for x
    x = 9,970,864,780.81/90,698.91
  6. Step 6: Final answer
    x = 109,933.68

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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.