Home / 90,768.54-136,167.36-31,621.02

Finding the Fourth Proportional to 90,768.54, 136,167.36 and 31,621.02

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Solution

The fourth proportional to 90,768.54, 136,167.36 and 31,621.02 is: 47,436.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,768.54 : 136,167.36 = 31,621.02 : x
  2. Step 2: Convert to fraction form
    90,768.54/136,167.36 = 31,621.02/x
  3. Step 3: Cross multiply
    90,768.54x = 136,167.36 × 31,621.02
  4. Step 4: Simplify right side
    90,768.54x = 4,305,750,813.91
  5. Step 5: Solve for x
    x = 4,305,750,813.91/90,768.54
  6. Step 6: Final answer
    x = 47,436.60

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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.