Home / 91,981.70-137,972.55-84,983.30

Finding the Fourth Proportional to 91,981.70, 137,972.55 and 84,983.30

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Solution

The fourth proportional to 91,981.70, 137,972.55 and 84,983.30 is: 127,474.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,981.70 : 137,972.55 = 84,983.30 : x
  2. Step 2: Convert to fraction form
    91,981.70/137,972.55 = 84,983.30/x
  3. Step 3: Cross multiply
    91,981.70x = 137,972.55 × 84,983.30
  4. Step 4: Simplify right side
    91,981.70x = 11,725,362,608.42
  5. Step 5: Solve for x
    x = 11,725,362,608.42/91,981.70
  6. Step 6: Final answer
    x = 127,474.95

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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.