Home / 91,009.36-136,509.18-28,675

Finding the Fourth Proportional to 91,009.36, 136,509.18 and 28,675

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Solution

The fourth proportional to 91,009.36, 136,509.18 and 28,675 is: 43,010.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,009.36 : 136,509.18 = 28,675 : x
  2. Step 2: Convert to fraction form
    91,009.36/136,509.18 = 28,675/x
  3. Step 3: Cross multiply
    91,009.36x = 136,509.18 × 28,675
  4. Step 4: Simplify right side
    91,009.36x = 3,914,400,736.50
  5. Step 5: Solve for x
    x = 3,914,400,736.50/91,009.36
  6. Step 6: Final answer
    x = 43,010.97

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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.