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Finding the Fourth Proportional to 156,087.49, 215,401.28 and 84,467.49

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Solution

The fourth proportional to 156,087.49, 215,401.28 and 84,467.49 is: 116,565.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,087.49 : 215,401.28 = 84,467.49 : x
  2. Step 2: Convert to fraction form
    156,087.49/215,401.28 = 84,467.49/x
  3. Step 3: Cross multiply
    156,087.49x = 215,401.28 × 84,467.49
  4. Step 4: Simplify right side
    156,087.49x = 18,194,405,791.72
  5. Step 5: Solve for x
    x = 18,194,405,791.72/156,087.49
  6. Step 6: Final answer
    x = 116,565.43

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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.