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Finding the Fourth Proportional to 89,816.80, 134,494.80 and 85,669.60

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Solution

The fourth proportional to 89,816.80, 134,494.80 and 85,669.60 is: 128,284.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,816.80 : 134,494.80 = 85,669.60 : x
  2. Step 2: Convert to fraction form
    89,816.80/134,494.80 = 85,669.60/x
  3. Step 3: Cross multiply
    89,816.80x = 134,494.80 × 85,669.60
  4. Step 4: Simplify right side
    89,816.80x = 11,522,115,718.08
  5. Step 5: Solve for x
    x = 11,522,115,718.08/89,816.80
  6. Step 6: Final answer
    x = 128,284.64

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1.5x scale

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.