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Finding the Fourth Proportional to 90,694.90, 124,828.62 and 79,868.91

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Solution

The fourth proportional to 90,694.90, 124,828.62 and 79,868.91 is: 109,928.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,694.90 : 124,828.62 = 79,868.91 : x
  2. Step 2: Convert to fraction form
    90,694.90/124,828.62 = 79,868.91/x
  3. Step 3: Cross multiply
    90,694.90x = 124,828.62 × 79,868.91
  4. Step 4: Simplify right side
    90,694.90x = 9,969,925,816.20
  5. Step 5: Solve for x
    x = 9,969,925,816.20/90,694.90
  6. Step 6: Final answer
    x = 109,928.19

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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.