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Finding the Fourth Proportional to 159,707.39, 220,395.76 and 91,728.74

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Solution

The fourth proportional to 159,707.39, 220,395.76 and 91,728.74 is: 126,585.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,707.39 : 220,395.76 = 91,728.74 : x
  2. Step 2: Convert to fraction form
    159,707.39/220,395.76 = 91,728.74/x
  3. Step 3: Cross multiply
    159,707.39x = 220,395.76 × 91,728.74
  4. Step 4: Simplify right side
    159,707.39x = 20,216,625,687.81
  5. Step 5: Solve for x
    x = 20,216,625,687.81/159,707.39
  6. Step 6: Final answer
    x = 126,585.42

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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.