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Finding the Fourth Proportional to 128,709.65, 177,513.99 and 90,595.37

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Solution

The fourth proportional to 128,709.65, 177,513.99 and 90,595.37 is: 124,947.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,709.65 : 177,513.99 = 90,595.37 : x
  2. Step 2: Convert to fraction form
    128,709.65/177,513.99 = 90,595.37/x
  3. Step 3: Cross multiply
    128,709.65x = 177,513.99 × 90,595.37
  4. Step 4: Simplify right side
    128,709.65x = 16,081,944,716.66
  5. Step 5: Solve for x
    x = 16,081,944,716.66/128,709.65
  6. Step 6: Final answer
    x = 124,947.47

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.