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Finding the Fourth Proportional to 85,660.70, 128,417.21 and 41,318.62

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Solution

The fourth proportional to 85,660.70, 128,417.21 and 41,318.62 is: 61,942.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,660.70 : 128,417.21 = 41,318.62 : x
  2. Step 2: Convert to fraction form
    85,660.70/128,417.21 = 41,318.62/x
  3. Step 3: Cross multiply
    85,660.70x = 128,417.21 × 41,318.62
  4. Step 4: Simplify right side
    85,660.70x = 5,306,021,901.45
  5. Step 5: Solve for x
    x = 5,306,021,901.45/85,660.70
  6. Step 6: Final answer
    x = 61,942.31

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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.