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Finding the Fourth Proportional to 90,851.64, 125,366.58 and 66,991.24

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Solution

The fourth proportional to 90,851.64, 125,366.58 and 66,991.24 is: 92,441.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,851.64 : 125,366.58 = 66,991.24 : x
  2. Step 2: Convert to fraction form
    90,851.64/125,366.58 = 66,991.24/x
  3. Step 3: Cross multiply
    90,851.64x = 125,366.58 × 66,991.24
  4. Step 4: Simplify right side
    90,851.64x = 8,398,462,648.76
  5. Step 5: Solve for x
    x = 8,398,462,648.76/90,851.64
  6. Step 6: Final answer
    x = 92,441.51

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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.