Home / 91,485.32-137,309.99-76,585.70

Finding the Fourth Proportional to 91,485.32, 137,309.99 and 76,585.70

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Solution

The fourth proportional to 91,485.32, 137,309.99 and 76,585.70 is: 114,947.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,485.32 : 137,309.99 = 76,585.70 : x
  2. Step 2: Convert to fraction form
    91,485.32/137,309.99 = 76,585.70/x
  3. Step 3: Cross multiply
    91,485.32x = 137,309.99 × 76,585.70
  4. Step 4: Simplify right side
    91,485.32x = 10,515,982,307.68
  5. Step 5: Solve for x
    x = 10,515,982,307.68/91,485.32
  6. Step 6: Final answer
    x = 114,947.21

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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.