Home / 91,585.14-138,001.80-75,309.78

Finding the Fourth Proportional to 91,585.14, 138,001.80 and 75,309.78

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Solution

The fourth proportional to 91,585.14, 138,001.80 and 75,309.78 is: 113,477.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,585.14 : 138,001.80 = 75,309.78 : x
  2. Step 2: Convert to fraction form
    91,585.14/138,001.80 = 75,309.78/x
  3. Step 3: Cross multiply
    91,585.14x = 138,001.80 × 75,309.78
  4. Step 4: Simplify right side
    91,585.14x = 10,392,885,197.60
  5. Step 5: Solve for x
    x = 10,392,885,197.60/91,585.14
  6. Step 6: Final answer
    x = 113,477.85

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.