Home / 109,501.78-164,039.64-71,947.75

Finding the Fourth Proportional to 109,501.78, 164,039.64 and 71,947.75

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Solution

The fourth proportional to 109,501.78, 164,039.64 and 71,947.75 is: 107,781.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,501.78 : 164,039.64 = 71,947.75 : x
  2. Step 2: Convert to fraction form
    109,501.78/164,039.64 = 71,947.75/x
  3. Step 3: Cross multiply
    109,501.78x = 164,039.64 × 71,947.75
  4. Step 4: Simplify right side
    109,501.78x = 11,802,283,008.81
  5. Step 5: Solve for x
    x = 11,802,283,008.81/109,501.78
  6. Step 6: Final answer
    x = 107,781.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.