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Finding the Fourth Proportional to 85,659.70, 128,415.71 and 41,317.62

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Solution

The fourth proportional to 85,659.70, 128,415.71 and 41,317.62 is: 61,940.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,659.70 : 128,415.71 = 41,317.62 : x
  2. Step 2: Convert to fraction form
    85,659.70/128,415.71 = 41,317.62/x
  3. Step 3: Cross multiply
    85,659.70x = 128,415.71 × 41,317.62
  4. Step 4: Simplify right side
    85,659.70x = 5,305,831,507.81
  5. Step 5: Solve for x
    x = 5,305,831,507.81/85,659.70
  6. Step 6: Final answer
    x = 61,940.81

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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.