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Finding the Fourth Proportional to 86,143.88, 129,153.44 and 26,947.46

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Solution

The fourth proportional to 86,143.88, 129,153.44 and 26,947.46 is: 40,401.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,143.88 : 129,153.44 = 26,947.46 : x
  2. Step 2: Convert to fraction form
    86,143.88/129,153.44 = 26,947.46/x
  3. Step 3: Cross multiply
    86,143.88x = 129,153.44 × 26,947.46
  4. Step 4: Simplify right side
    86,143.88x = 3,480,357,158.26
  5. Step 5: Solve for x
    x = 3,480,357,158.26/86,143.88
  6. Step 6: Final answer
    x = 40,401.68

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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.