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Finding the Fourth Proportional to 89,255, 133,882.96 and 30,091.20

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Solution

The fourth proportional to 89,255, 133,882.96 and 30,091.20 is: 45,136.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,255 : 133,882.96 = 30,091.20 : x
  2. Step 2: Convert to fraction form
    89,255/133,882.96 = 30,091.20/x
  3. Step 3: Cross multiply
    89,255x = 133,882.96 × 30,091.20
  4. Step 4: Simplify right side
    89,255x = 4,028,698,925.95
  5. Step 5: Solve for x
    x = 4,028,698,925.95/89,255
  6. Step 6: Final answer
    x = 45,136.96

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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.