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Finding the Fourth Proportional to 156,289.49, 215,679.68 and 84,668.88

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Solution

The fourth proportional to 156,289.49, 215,679.68 and 84,668.88 is: 116,843.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,289.49 : 215,679.68 = 84,668.88 : x
  2. Step 2: Convert to fraction form
    156,289.49/215,679.68 = 84,668.88/x
  3. Step 3: Cross multiply
    156,289.49x = 215,679.68 × 84,668.88
  4. Step 4: Simplify right side
    156,289.49x = 18,261,356,944.36
  5. Step 5: Solve for x
    x = 18,261,356,944.36/156,289.49
  6. Step 6: Final answer
    x = 116,843.15

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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.