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Finding the Fourth Proportional to 93,720.20, 140,424.78 and 65,959.88

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Solution

The fourth proportional to 93,720.20, 140,424.78 and 65,959.88 is: 98,830.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,720.20 : 140,424.78 = 65,959.88 : x
  2. Step 2: Convert to fraction form
    93,720.20/140,424.78 = 65,959.88/x
  3. Step 3: Cross multiply
    93,720.20x = 140,424.78 × 65,959.88
  4. Step 4: Simplify right side
    93,720.20x = 9,262,401,637.83
  5. Step 5: Solve for x
    x = 9,262,401,637.83/93,720.20
  6. Step 6: Final answer
    x = 98,830.37

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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.