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Finding the Fourth Proportional to 159,139.71, 219,614.97 and 91,156.64

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Solution

The fourth proportional to 159,139.71, 219,614.97 and 91,156.64 is: 125,797.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,139.71 : 219,614.97 = 91,156.64 : x
  2. Step 2: Convert to fraction form
    159,139.71/219,614.97 = 91,156.64/x
  3. Step 3: Cross multiply
    159,139.71x = 219,614.97 × 91,156.64
  4. Step 4: Simplify right side
    159,139.71x = 20,019,362,303.12
  5. Step 5: Solve for x
    x = 20,019,362,303.12/159,139.71
  6. Step 6: Final answer
    x = 125,797.41

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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.