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Finding the Fourth Proportional to 128,530.60, 192,680.70 and 114,533.80

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Solution

The fourth proportional to 128,530.60, 192,680.70 and 114,533.80 is: 171,698.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,530.60 : 192,680.70 = 114,533.80 : x
  2. Step 2: Convert to fraction form
    128,530.60/192,680.70 = 114,533.80/x
  3. Step 3: Cross multiply
    128,530.60x = 192,680.70 × 114,533.80
  4. Step 4: Simplify right side
    128,530.60x = 22,068,452,757.66
  5. Step 5: Solve for x
    x = 22,068,452,757.66/128,530.60
  6. Step 6: Final answer
    x = 171,698.05

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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.