Home / 90,964.77-135,735.70-81,508.58

Finding the Fourth Proportional to 90,964.77, 135,735.70 and 81,508.58

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Solution

The fourth proportional to 90,964.77, 135,735.70 and 81,508.58 is: 121,625.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,964.77 : 135,735.70 = 81,508.58 : x
  2. Step 2: Convert to fraction form
    90,964.77/135,735.70 = 81,508.58/x
  3. Step 3: Cross multiply
    90,964.77x = 135,735.70 × 81,508.58
  4. Step 4: Simplify right side
    90,964.77x = 11,063,623,941.69
  5. Step 5: Solve for x
    x = 11,063,623,941.69/90,964.77
  6. Step 6: Final answer
    x = 121,625.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.