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Finding the Fourth Proportional to 123,340.51, 170,210.31 and 66,751.87

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Solution

The fourth proportional to 123,340.51, 170,210.31 and 66,751.87 is: 92,117.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,340.51 : 170,210.31 = 66,751.87 : x
  2. Step 2: Convert to fraction form
    123,340.51/170,210.31 = 66,751.87/x
  3. Step 3: Cross multiply
    123,340.51x = 170,210.31 × 66,751.87
  4. Step 4: Simplify right side
    123,340.51x = 11,361,856,485.78
  5. Step 5: Solve for x
    x = 11,361,856,485.78/123,340.51
  6. Step 6: Final answer
    x = 92,117.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.