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Finding the Fourth Proportional to 89,221.34, 123,128.90 and 48,936.80

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Solution

The fourth proportional to 89,221.34, 123,128.90 and 48,936.80 is: 67,534.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,221.34 : 123,128.90 = 48,936.80 : x
  2. Step 2: Convert to fraction form
    89,221.34/123,128.90 = 48,936.80/x
  3. Step 3: Cross multiply
    89,221.34x = 123,128.90 × 48,936.80
  4. Step 4: Simplify right side
    89,221.34x = 6,025,533,493.19
  5. Step 5: Solve for x
    x = 6,025,533,493.19/89,221.34
  6. Step 6: Final answer
    x = 67,534.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.