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Finding the Fourth Proportional to 93,078.74, 139,507.14 and 64,845.92

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Solution

The fourth proportional to 93,078.74, 139,507.14 and 64,845.92 is: 97,191.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,078.74 : 139,507.14 = 64,845.92 : x
  2. Step 2: Convert to fraction form
    93,078.74/139,507.14 = 64,845.92/x
  3. Step 3: Cross multiply
    93,078.74x = 139,507.14 × 64,845.92
  4. Step 4: Simplify right side
    93,078.74x = 9,046,468,839.87
  5. Step 5: Solve for x
    x = 9,046,468,839.87/93,078.74
  6. Step 6: Final answer
    x = 97,191.57

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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.