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Finding the Fourth Proportional to 86,614.10, 121,434.70 and 86,614.10

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Solution

The fourth proportional to 86,614.10, 121,434.70 and 86,614.10 is: 121,434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,614.10 : 121,434.70 = 86,614.10 : x
  2. Step 2: Convert to fraction form
    86,614.10/121,434.70 = 86,614.10/x
  3. Step 3: Cross multiply
    86,614.10x = 121,434.70 × 86,614.10
  4. Step 4: Simplify right side
    86,614.10x = 10,517,957,249.27
  5. Step 5: Solve for x
    x = 10,517,957,249.27/86,614.10
  6. Step 6: Final answer
    x = 121,434.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.