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Finding the Fourth Proportional to 89,126.80, 133,690.20 and 86,822.80

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Solution

The fourth proportional to 89,126.80, 133,690.20 and 86,822.80 is: 130,234.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,126.80 : 133,690.20 = 86,822.80 : x
  2. Step 2: Convert to fraction form
    89,126.80/133,690.20 = 86,822.80/x
  3. Step 3: Cross multiply
    89,126.80x = 133,690.20 × 86,822.80
  4. Step 4: Simplify right side
    89,126.80x = 11,607,357,496.56
  5. Step 5: Solve for x
    x = 11,607,357,496.56/89,126.80
  6. Step 6: Final answer
    x = 130,234.20

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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.