Home / 155,949.96-215,211.09-91,406.33

Finding the Fourth Proportional to 155,949.96, 215,211.09 and 91,406.33

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Solution

The fourth proportional to 155,949.96, 215,211.09 and 91,406.33 is: 126,140.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,949.96 : 215,211.09 = 91,406.33 : x
  2. Step 2: Convert to fraction form
    155,949.96/215,211.09 = 91,406.33/x
  3. Step 3: Cross multiply
    155,949.96x = 215,211.09 × 91,406.33
  4. Step 4: Simplify right side
    155,949.96x = 19,671,654,836.14
  5. Step 5: Solve for x
    x = 19,671,654,836.14/155,949.96
  6. Step 6: Final answer
    x = 126,140.81

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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.