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Finding the Fourth Proportional to 159,903.81, 220,643.64 and 91,923.66

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Solution

The fourth proportional to 159,903.81, 220,643.64 and 91,923.66 is: 126,841.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,903.81 : 220,643.64 = 91,923.66 : x
  2. Step 2: Convert to fraction form
    159,903.81/220,643.64 = 91,923.66/x
  3. Step 3: Cross multiply
    159,903.81x = 220,643.64 × 91,923.66
  4. Step 4: Simplify right side
    159,903.81x = 20,282,370,944.52
  5. Step 5: Solve for x
    x = 20,282,370,944.52/159,903.81
  6. Step 6: Final answer
    x = 126,841.07

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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.