Home / 90,451.12-135,676.69-31,254.50

Finding the Fourth Proportional to 90,451.12, 135,676.69 and 31,254.50

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Solution

The fourth proportional to 90,451.12, 135,676.69 and 31,254.50 is: 46,881.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,451.12 : 135,676.69 = 31,254.50 : x
  2. Step 2: Convert to fraction form
    90,451.12/135,676.69 = 31,254.50/x
  3. Step 3: Cross multiply
    90,451.12x = 135,676.69 × 31,254.50
  4. Step 4: Simplify right side
    90,451.12x = 4,240,507,107.61
  5. Step 5: Solve for x
    x = 4,240,507,107.61/90,451.12
  6. Step 6: Final answer
    x = 46,881.75

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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.