Home / 89,187.40-133,781.10-81,022.60

Finding the Fourth Proportional to 89,187.40, 133,781.10 and 81,022.60

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Solution

The fourth proportional to 89,187.40, 133,781.10 and 81,022.60 is: 121,533.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,187.40 : 133,781.10 = 81,022.60 : x
  2. Step 2: Convert to fraction form
    89,187.40/133,781.10 = 81,022.60/x
  3. Step 3: Cross multiply
    89,187.40x = 133,781.10 × 81,022.60
  4. Step 4: Simplify right side
    89,187.40x = 10,839,292,552.86
  5. Step 5: Solve for x
    x = 10,839,292,552.86/89,187.40
  6. Step 6: Final answer
    x = 121,533.90

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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.