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Finding the Fourth Proportional to 254,169.77, 380,988.63 and 85,631.85

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Solution

The fourth proportional to 254,169.77, 380,988.63 and 85,631.85 is: 128,358.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,169.77 : 380,988.63 = 85,631.85 : x
  2. Step 2: Convert to fraction form
    254,169.77/380,988.63 = 85,631.85/x
  3. Step 3: Cross multiply
    254,169.77x = 380,988.63 × 85,631.85
  4. Step 4: Simplify right side
    254,169.77x = 32,624,761,215.87
  5. Step 5: Solve for x
    x = 32,624,761,215.87/254,169.77
  6. Step 6: Final answer
    x = 128,358.15

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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.