Home / 90,186.13-135,240.72-31,027.78

Finding the Fourth Proportional to 90,186.13, 135,240.72 and 31,027.78

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Solution

The fourth proportional to 90,186.13, 135,240.72 and 31,027.78 is: 46,528.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,186.13 : 135,240.72 = 31,027.78 : x
  2. Step 2: Convert to fraction form
    90,186.13/135,240.72 = 31,027.78/x
  3. Step 3: Cross multiply
    90,186.13x = 135,240.72 × 31,027.78
  4. Step 4: Simplify right side
    90,186.13x = 4,196,219,307.20
  5. Step 5: Solve for x
    x = 4,196,219,307.20/90,186.13
  6. Step 6: Final answer
    x = 46,528.43

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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.