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Finding the Fourth Proportional to 128,308.52, 192,470.64 and 49,422.98

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Solution

The fourth proportional to 128,308.52, 192,470.64 and 49,422.98 is: 74,137.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,308.52 : 192,470.64 = 49,422.98 : x
  2. Step 2: Convert to fraction form
    128,308.52/192,470.64 = 49,422.98/x
  3. Step 3: Cross multiply
    128,308.52x = 192,470.64 × 49,422.98
  4. Step 4: Simplify right side
    128,308.52x = 9,512,472,591.31
  5. Step 5: Solve for x
    x = 9,512,472,591.31/128,308.52
  6. Step 6: Final answer
    x = 74,137.50

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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.