Home / 90,778.47-136,171.35-31,620.12

Finding the Fourth Proportional to 90,778.47, 136,171.35 and 31,620.12

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Solution

The fourth proportional to 90,778.47, 136,171.35 and 31,620.12 is: 47,431.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,778.47 : 136,171.35 = 31,620.12 : x
  2. Step 2: Convert to fraction form
    90,778.47/136,171.35 = 31,620.12/x
  3. Step 3: Cross multiply
    90,778.47x = 136,171.35 × 31,620.12
  4. Step 4: Simplify right side
    90,778.47x = 4,305,754,427.56
  5. Step 5: Solve for x
    x = 4,305,754,427.56/90,778.47
  6. Step 6: Final answer
    x = 47,431.45

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1.5x scale

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.