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Finding the Fourth Proportional to 128,459.60, 192,574.20 and 114,462.80

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Solution

The fourth proportional to 128,459.60, 192,574.20 and 114,462.80 is: 171,591.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,459.60 : 192,574.20 = 114,462.80 : x
  2. Step 2: Convert to fraction form
    128,459.60/192,574.20 = 114,462.80/x
  3. Step 3: Cross multiply
    128,459.60x = 192,574.20 × 114,462.80
  4. Step 4: Simplify right side
    128,459.60x = 22,042,582,139.76
  5. Step 5: Solve for x
    x = 22,042,582,139.76/128,459.60
  6. Step 6: Final answer
    x = 171,591.55

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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.