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Finding the Fourth Proportional to 156,383.46, 215,808.39 and 84,762.90

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Solution

The fourth proportional to 156,383.46, 215,808.39 and 84,762.90 is: 116,972.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,383.46 : 215,808.39 = 84,762.90 : x
  2. Step 2: Convert to fraction form
    156,383.46/215,808.39 = 84,762.90/x
  3. Step 3: Cross multiply
    156,383.46x = 215,808.39 × 84,762.90
  4. Step 4: Simplify right side
    156,383.46x = 18,292,544,980.73
  5. Step 5: Solve for x
    x = 18,292,544,980.73/156,383.46
  6. Step 6: Final answer
    x = 116,972.38

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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.