Home / 93,418.45-128,878.19-65,140.54

Finding the Fourth Proportional to 93,418.45, 128,878.19 and 65,140.54

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Solution

The fourth proportional to 93,418.45, 128,878.19 and 65,140.54 is: 89,866.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,418.45 : 128,878.19 = 65,140.54 : x
  2. Step 2: Convert to fraction form
    93,418.45/128,878.19 = 65,140.54/x
  3. Step 3: Cross multiply
    93,418.45x = 128,878.19 × 65,140.54
  4. Step 4: Simplify right side
    93,418.45x = 8,395,194,487.20
  5. Step 5: Solve for x
    x = 8,395,194,487.20/93,418.45
  6. Step 6: Final answer
    x = 89,866.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.