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Finding the Fourth Proportional to 92,960.10, 139,440.15 and 86,399.10

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Solution

The fourth proportional to 92,960.10, 139,440.15 and 86,399.10 is: 129,598.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,960.10 : 139,440.15 = 86,399.10 : x
  2. Step 2: Convert to fraction form
    92,960.10/139,440.15 = 86,399.10/x
  3. Step 3: Cross multiply
    92,960.10x = 139,440.15 × 86,399.10
  4. Step 4: Simplify right side
    92,960.10x = 12,047,503,463.87
  5. Step 5: Solve for x
    x = 12,047,503,463.87/92,960.10
  6. Step 6: Final answer
    x = 129,598.65

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1.5x scale

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.