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Finding the Fourth Proportional to 156,299.80, 215,693.94 and 84,679.82

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Solution

The fourth proportional to 156,299.80, 215,693.94 and 84,679.82 is: 116,858.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,299.80 : 215,693.94 = 84,679.82 : x
  2. Step 2: Convert to fraction form
    156,299.80/215,693.94 = 84,679.82/x
  3. Step 3: Cross multiply
    156,299.80x = 215,693.94 × 84,679.82
  4. Step 4: Simplify right side
    156,299.80x = 18,264,923,590.89
  5. Step 5: Solve for x
    x = 18,264,923,590.89/156,299.80
  6. Step 6: Final answer
    x = 116,858.27

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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.