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Finding the Fourth Proportional to 128,069.43, 192,101.44 and 42,686.47

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Solution

The fourth proportional to 128,069.43, 192,101.44 and 42,686.47 is: 64,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,069.43 : 192,101.44 = 42,686.47 : x
  2. Step 2: Convert to fraction form
    128,069.43/192,101.44 = 42,686.47/x
  3. Step 3: Cross multiply
    128,069.43x = 192,101.44 × 42,686.47
  4. Step 4: Simplify right side
    128,069.43x = 8,200,132,355.52
  5. Step 5: Solve for x
    x = 8,200,132,355.52/128,069.43
  6. Step 6: Final answer
    x = 64,028.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.