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Finding the Fourth Proportional to 89,342.40, 133,819.20 and 54,220.80

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Solution

The fourth proportional to 89,342.40, 133,819.20 and 54,220.80 is: 81,213.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,342.40 : 133,819.20 = 54,220.80 : x
  2. Step 2: Convert to fraction form
    89,342.40/133,819.20 = 54,220.80/x
  3. Step 3: Cross multiply
    89,342.40x = 133,819.20 × 54,220.80
  4. Step 4: Simplify right side
    89,342.40x = 7,255,784,079.36
  5. Step 5: Solve for x
    x = 7,255,784,079.36/89,342.40
  6. Step 6: Final answer
    x = 81,213.22

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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.