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Finding the Fourth Proportional to 254,626.80, 381,981.48 and 86,157.36

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Solution

The fourth proportional to 254,626.80, 381,981.48 and 86,157.36 is: 129,250.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,626.80 : 381,981.48 = 86,157.36 : x
  2. Step 2: Convert to fraction form
    254,626.80/381,981.48 = 86,157.36/x
  3. Step 3: Cross multiply
    254,626.80x = 381,981.48 × 86,157.36
  4. Step 4: Simplify right side
    254,626.80x = 32,910,515,885.69
  5. Step 5: Solve for x
    x = 32,910,515,885.69/254,626.80
  6. Step 6: Final answer
    x = 129,250.01

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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.