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Finding the Fourth Proportional to 89,223.40, 133,575.90 and 86,631.40

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Solution

The fourth proportional to 89,223.40, 133,575.90 and 86,631.40 is: 129,695.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,223.40 : 133,575.90 = 86,631.40 : x
  2. Step 2: Convert to fraction form
    89,223.40/133,575.90 = 86,631.40/x
  3. Step 3: Cross multiply
    89,223.40x = 133,575.90 × 86,631.40
  4. Step 4: Simplify right side
    89,223.40x = 11,571,867,223.26
  5. Step 5: Solve for x
    x = 11,571,867,223.26/89,223.40
  6. Step 6: Final answer
    x = 129,695.43

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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.