Home / 123,120.66-169,907.09-72,142.46

Finding the Fourth Proportional to 123,120.66, 169,907.09 and 72,142.46

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Solution

The fourth proportional to 123,120.66, 169,907.09 and 72,142.46 is: 99,556.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,120.66 : 169,907.09 = 72,142.46 : x
  2. Step 2: Convert to fraction form
    123,120.66/169,907.09 = 72,142.46/x
  3. Step 3: Cross multiply
    123,120.66x = 169,907.09 × 72,142.46
  4. Step 4: Simplify right side
    123,120.66x = 12,257,515,444.04
  5. Step 5: Solve for x
    x = 12,257,515,444.04/123,120.66
  6. Step 6: Final answer
    x = 99,556.93

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1.5x scale

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.