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Finding the Fourth Proportional to 149,429.91, 206,210.75 and 81,447.49

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Solution

The fourth proportional to 149,429.91, 206,210.75 and 81,447.49 is: 112,396.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,429.91 : 206,210.75 = 81,447.49 : x
  2. Step 2: Convert to fraction form
    149,429.91/206,210.75 = 81,447.49/x
  3. Step 3: Cross multiply
    149,429.91x = 206,210.75 × 81,447.49
  4. Step 4: Simplify right side
    149,429.91x = 16,795,347,849.04
  5. Step 5: Solve for x
    x = 16,795,347,849.04/149,429.91
  6. Step 6: Final answer
    x = 112,396.16

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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.