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Finding the Fourth Proportional to 85,230.78, 127,904.49 and 43,706.94

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Solution

The fourth proportional to 85,230.78, 127,904.49 and 43,706.94 is: 65,590.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,230.78 : 127,904.49 = 43,706.94 : x
  2. Step 2: Convert to fraction form
    85,230.78/127,904.49 = 43,706.94/x
  3. Step 3: Cross multiply
    85,230.78x = 127,904.49 × 43,706.94
  4. Step 4: Simplify right side
    85,230.78x = 5,590,313,870.16
  5. Step 5: Solve for x
    x = 5,590,313,870.16/85,230.78
  6. Step 6: Final answer
    x = 65,590.32

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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.