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Finding the Fourth Proportional to 315,732.60, 473,195.70 and 128,532.60

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Solution

The fourth proportional to 315,732.60, 473,195.70 and 128,532.60 is: 192,634.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,732.60 : 473,195.70 = 128,532.60 : x
  2. Step 2: Convert to fraction form
    315,732.60/473,195.70 = 128,532.60/x
  3. Step 3: Cross multiply
    315,732.60x = 473,195.70 × 128,532.60
  4. Step 4: Simplify right side
    315,732.60x = 60,821,073,629.82
  5. Step 5: Solve for x
    x = 60,821,073,629.82/315,732.60
  6. Step 6: Final answer
    x = 192,634.76

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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.