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Finding the Fourth Proportional to 128,901.60, 193,352.40 and 121,520.48

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Solution

The fourth proportional to 128,901.60, 193,352.40 and 121,520.48 is: 182,280.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,901.60 : 193,352.40 = 121,520.48 : x
  2. Step 2: Convert to fraction form
    128,901.60/193,352.40 = 121,520.48/x
  3. Step 3: Cross multiply
    128,901.60x = 193,352.40 × 121,520.48
  4. Step 4: Simplify right side
    128,901.60x = 23,496,275,490.39
  5. Step 5: Solve for x
    x = 23,496,275,490.39/128,901.60
  6. Step 6: Final answer
    x = 182,280.71

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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.