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Finding the Fourth Proportional to 89,083.80, 133,625.70 and 81,048.60

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Solution

The fourth proportional to 89,083.80, 133,625.70 and 81,048.60 is: 121,572.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,083.80 : 133,625.70 = 81,048.60 : x
  2. Step 2: Convert to fraction form
    89,083.80/133,625.70 = 81,048.60/x
  3. Step 3: Cross multiply
    89,083.80x = 133,625.70 × 81,048.60
  4. Step 4: Simplify right side
    89,083.80x = 10,830,175,909.02
  5. Step 5: Solve for x
    x = 10,830,175,909.02/89,083.80
  6. Step 6: Final answer
    x = 121,572.90

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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.