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Finding the Fourth Proportional to 89,905.40, 134,858.10 and 82,323.80

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Solution

The fourth proportional to 89,905.40, 134,858.10 and 82,323.80 is: 123,485.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,905.40 : 134,858.10 = 82,323.80 : x
  2. Step 2: Convert to fraction form
    89,905.40/134,858.10 = 82,323.80/x
  3. Step 3: Cross multiply
    89,905.40x = 134,858.10 × 82,323.80
  4. Step 4: Simplify right side
    89,905.40x = 11,102,031,252.78
  5. Step 5: Solve for x
    x = 11,102,031,252.78/89,905.40
  6. Step 6: Final answer
    x = 123,485.70

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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.