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Finding the Fourth Proportional to 89,822.80, 134,503.80 and 85,675.60

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Solution

The fourth proportional to 89,822.80, 134,503.80 and 85,675.60 is: 128,293.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,822.80 : 134,503.80 = 85,675.60 : x
  2. Step 2: Convert to fraction form
    89,822.80/134,503.80 = 85,675.60/x
  3. Step 3: Cross multiply
    89,822.80x = 134,503.80 × 85,675.60
  4. Step 4: Simplify right side
    89,822.80x = 11,523,693,767.28
  5. Step 5: Solve for x
    x = 11,523,693,767.28/89,822.80
  6. Step 6: Final answer
    x = 128,293.64

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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.