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Finding the Fourth Proportional to 85,934.70, 128,792.70 and 41,465.70

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Solution

The fourth proportional to 85,934.70, 128,792.70 and 41,465.70 is: 62,145.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,934.70 : 128,792.70 = 41,465.70 : x
  2. Step 2: Convert to fraction form
    85,934.70/128,792.70 = 41,465.70/x
  3. Step 3: Cross multiply
    85,934.70x = 128,792.70 × 41,465.70
  4. Step 4: Simplify right side
    85,934.70x = 5,340,479,460.39
  5. Step 5: Solve for x
    x = 5,340,479,460.39/85,934.70
  6. Step 6: Final answer
    x = 62,145.79

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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.