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Finding the Fourth Proportional to 93,149.68, 139,724.52 and 76,667.08

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Solution

The fourth proportional to 93,149.68, 139,724.52 and 76,667.08 is: 115,000.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,149.68 : 139,724.52 = 76,667.08 : x
  2. Step 2: Convert to fraction form
    93,149.68/139,724.52 = 76,667.08/x
  3. Step 3: Cross multiply
    93,149.68x = 139,724.52 × 76,667.08
  4. Step 4: Simplify right side
    93,149.68x = 10,712,270,952.80
  5. Step 5: Solve for x
    x = 10,712,270,952.80/93,149.68
  6. Step 6: Final answer
    x = 115,000.62

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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.