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Finding the Fourth Proportional to 120,143.80, 165,792.30 and 67,151.80

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Solution

The fourth proportional to 120,143.80, 165,792.30 and 67,151.80 is: 92,666.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,143.80 : 165,792.30 = 67,151.80 : x
  2. Step 2: Convert to fraction form
    120,143.80/165,792.30 = 67,151.80/x
  3. Step 3: Cross multiply
    120,143.80x = 165,792.30 × 67,151.80
  4. Step 4: Simplify right side
    120,143.80x = 11,133,251,371.14
  5. Step 5: Solve for x
    x = 11,133,251,371.14/120,143.80
  6. Step 6: Final answer
    x = 92,666.05

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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.