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Finding the Fourth Proportional to 85,551.93, 128,140.83 and 43,359.57

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Solution

The fourth proportional to 85,551.93, 128,140.83 and 43,359.57 is: 64,944.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551.93 : 128,140.83 = 43,359.57 : x
  2. Step 2: Convert to fraction form
    85,551.93/128,140.83 = 43,359.57/x
  3. Step 3: Cross multiply
    85,551.93x = 128,140.83 × 43,359.57
  4. Step 4: Simplify right side
    85,551.93x = 5,556,131,288.24
  5. Step 5: Solve for x
    x = 5,556,131,288.24/85,551.93
  6. Step 6: Final answer
    x = 64,944.55

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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.