Home / 90,171.04-135,196.08-80,788

Finding the Fourth Proportional to 90,171.04, 135,196.08 and 80,788

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Solution

The fourth proportional to 90,171.04, 135,196.08 and 80,788 is: 121,127.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,171.04 : 135,196.08 = 80,788 : x
  2. Step 2: Convert to fraction form
    90,171.04/135,196.08 = 80,788/x
  3. Step 3: Cross multiply
    90,171.04x = 135,196.08 × 80,788
  4. Step 4: Simplify right side
    90,171.04x = 10,922,220,911.04
  5. Step 5: Solve for x
    x = 10,922,220,911.04/90,171.04
  6. Step 6: Final answer
    x = 121,127.81

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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.