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Finding the Fourth Proportional to 128,602.20, 192,933.69 and 53,680.71

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Solution

The fourth proportional to 128,602.20, 192,933.69 and 53,680.71 is: 80,533.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,602.20 : 192,933.69 = 53,680.71 : x
  2. Step 2: Convert to fraction form
    128,602.20/192,933.69 = 53,680.71/x
  3. Step 3: Cross multiply
    128,602.20x = 192,933.69 × 53,680.71
  4. Step 4: Simplify right side
    128,602.20x = 10,356,817,462.12
  5. Step 5: Solve for x
    x = 10,356,817,462.12/128,602.20
  6. Step 6: Final answer
    x = 80,533.75

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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.