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Finding the Fourth Proportional to 138,151.70, 190,476.33 and 115,523.54

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Solution

The fourth proportional to 138,151.70, 190,476.33 and 115,523.54 is: 159,277.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,151.70 : 190,476.33 = 115,523.54 : x
  2. Step 2: Convert to fraction form
    138,151.70/190,476.33 = 115,523.54/x
  3. Step 3: Cross multiply
    138,151.70x = 190,476.33 × 115,523.54
  4. Step 4: Simplify right side
    138,151.70x = 22,004,499,927.81
  5. Step 5: Solve for x
    x = 22,004,499,927.81/138,151.70
  6. Step 6: Final answer
    x = 159,277.81

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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.