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Finding the Fourth Proportional to 156,466.72, 215,927.52 and 92,781.28

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Solution

The fourth proportional to 156,466.72, 215,927.52 and 92,781.28 is: 128,040.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,466.72 : 215,927.52 = 92,781.28 : x
  2. Step 2: Convert to fraction form
    156,466.72/215,927.52 = 92,781.28/x
  3. Step 3: Cross multiply
    156,466.72x = 215,927.52 × 92,781.28
  4. Step 4: Simplify right side
    156,466.72x = 20,034,031,692.83
  5. Step 5: Solve for x
    x = 20,034,031,692.83/156,466.72
  6. Step 6: Final answer
    x = 128,040.21

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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.