Home / 90,880.11-136,382.45-31,715.78

Finding the Fourth Proportional to 90,880.11, 136,382.45 and 31,715.78

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Solution

The fourth proportional to 90,880.11, 136,382.45 and 31,715.78 is: 47,595.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,880.11 : 136,382.45 = 31,715.78 : x
  2. Step 2: Convert to fraction form
    90,880.11/136,382.45 = 31,715.78/x
  3. Step 3: Cross multiply
    90,880.11x = 136,382.45 × 31,715.78
  4. Step 4: Simplify right side
    90,880.11x = 4,325,474,939.57
  5. Step 5: Solve for x
    x = 4,325,474,939.57/90,880.11
  6. Step 6: Final answer
    x = 47,595.40

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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.