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Finding the Fourth Proportional to 159,670.42, 220,335.10 and 91,639.51

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Solution

The fourth proportional to 159,670.42, 220,335.10 and 91,639.51 is: 126,456.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,670.42 : 220,335.10 = 91,639.51 : x
  2. Step 2: Convert to fraction form
    159,670.42/220,335.10 = 91,639.51/x
  3. Step 3: Cross multiply
    159,670.42x = 220,335.10 × 91,639.51
  4. Step 4: Simplify right side
    159,670.42x = 20,191,399,819.86
  5. Step 5: Solve for x
    x = 20,191,399,819.86/159,670.42
  6. Step 6: Final answer
    x = 126,456.74

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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.