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Finding the Fourth Proportional to 156,351.60, 215,765.52 and 91,808.40

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Solution

The fourth proportional to 156,351.60, 215,765.52 and 91,808.40 is: 126,695.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,351.60 : 215,765.52 = 91,808.40 : x
  2. Step 2: Convert to fraction form
    156,351.60/215,765.52 = 91,808.40/x
  3. Step 3: Cross multiply
    156,351.60x = 215,765.52 × 91,808.40
  4. Step 4: Simplify right side
    156,351.60x = 19,809,087,166.37
  5. Step 5: Solve for x
    x = 19,809,087,166.37/156,351.60
  6. Step 6: Final answer
    x = 126,695.78

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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.