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Finding the Fourth Proportional to 367,851.76, 551,762.34 and 128,020.60

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Solution

The fourth proportional to 367,851.76, 551,762.34 and 128,020.60 is: 192,025.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,851.76 : 551,762.34 = 128,020.60 : x
  2. Step 2: Convert to fraction form
    367,851.76/551,762.34 = 128,020.60/x
  3. Step 3: Cross multiply
    367,851.76x = 551,762.34 × 128,020.60
  4. Step 4: Simplify right side
    367,851.76x = 70,636,945,824.20
  5. Step 5: Solve for x
    x = 70,636,945,824.20/367,851.76
  6. Step 6: Final answer
    x = 192,025.58

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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.