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Finding the Fourth Proportional to 85,600.64, 128,260.64 and 82,319.84

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Solution

The fourth proportional to 85,600.64, 128,260.64 and 82,319.84 is: 123,344.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,600.64 : 128,260.64 = 82,319.84 : x
  2. Step 2: Convert to fraction form
    85,600.64/128,260.64 = 82,319.84/x
  3. Step 3: Cross multiply
    85,600.64x = 128,260.64 × 82,319.84
  4. Step 4: Simplify right side
    85,600.64x = 10,558,395,363.10
  5. Step 5: Solve for x
    x = 10,558,395,363.10/85,600.64
  6. Step 6: Final answer
    x = 123,344.82

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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.