Home / 91,815.10-137,431.05-84,816.70

Finding the Fourth Proportional to 91,815.10, 137,431.05 and 84,816.70

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Solution

The fourth proportional to 91,815.10, 137,431.05 and 84,816.70 is: 126,955.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,815.10 : 137,431.05 = 84,816.70 : x
  2. Step 2: Convert to fraction form
    91,815.10/137,431.05 = 84,816.70/x
  3. Step 3: Cross multiply
    91,815.10x = 137,431.05 × 84,816.70
  4. Step 4: Simplify right side
    91,815.10x = 11,656,448,138.54
  5. Step 5: Solve for x
    x = 11,656,448,138.54/91,815.10
  6. Step 6: Final answer
    x = 126,955.68

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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.