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Finding the Fourth Proportional to 156,401.73, 215,835.72 and 84,782.94

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Solution

The fourth proportional to 156,401.73, 215,835.72 and 84,782.94 is: 117,001.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,401.73 : 215,835.72 = 84,782.94 : x
  2. Step 2: Convert to fraction form
    156,401.73/215,835.72 = 84,782.94/x
  3. Step 3: Cross multiply
    156,401.73x = 215,835.72 × 84,782.94
  4. Step 4: Simplify right side
    156,401.73x = 18,299,186,898.62
  5. Step 5: Solve for x
    x = 18,299,186,898.62/156,401.73
  6. Step 6: Final answer
    x = 117,001.18

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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.