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Finding the Fourth Proportional to 129,213.99, 193,623.13 and 86,937.45

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Solution

The fourth proportional to 129,213.99, 193,623.13 and 86,937.45 is: 130,273.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,213.99 : 193,623.13 = 86,937.45 : x
  2. Step 2: Convert to fraction form
    129,213.99/193,623.13 = 86,937.45/x
  3. Step 3: Cross multiply
    129,213.99x = 193,623.13 × 86,937.45
  4. Step 4: Simplify right side
    129,213.99x = 16,833,102,017.98
  5. Step 5: Solve for x
    x = 16,833,102,017.98/129,213.99
  6. Step 6: Final answer
    x = 130,273.06

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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.