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Finding the Fourth Proportional to 84,150.90, 125,733.42 and 81,207.63

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Solution

The fourth proportional to 84,150.90, 125,733.42 and 81,207.63 is: 121,335.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,150.90 : 125,733.42 = 81,207.63 : x
  2. Step 2: Convert to fraction form
    84,150.90/125,733.42 = 81,207.63/x
  3. Step 3: Cross multiply
    84,150.90x = 125,733.42 × 81,207.63
  4. Step 4: Simplify right side
    84,150.90x = 10,210,513,049.99
  5. Step 5: Solve for x
    x = 10,210,513,049.99/84,150.90
  6. Step 6: Final answer
    x = 121,335.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.