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Finding the Fourth Proportional to 85,179.66, 127,113.24 and 74,813.28

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Solution

The fourth proportional to 85,179.66, 127,113.24 and 74,813.28 is: 111,643.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,179.66 : 127,113.24 = 74,813.28 : x
  2. Step 2: Convert to fraction form
    85,179.66/127,113.24 = 74,813.28/x
  3. Step 3: Cross multiply
    85,179.66x = 127,113.24 × 74,813.28
  4. Step 4: Simplify right side
    85,179.66x = 9,509,758,415.83
  5. Step 5: Solve for x
    x = 9,509,758,415.83/85,179.66
  6. Step 6: Final answer
    x = 111,643.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.