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Finding the Fourth Proportional to 123,881.04, 170,643.24 and 99,940.68

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Solution

The fourth proportional to 123,881.04, 170,643.24 and 99,940.68 is: 137,665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,881.04 : 170,643.24 = 99,940.68 : x
  2. Step 2: Convert to fraction form
    123,881.04/170,643.24 = 99,940.68/x
  3. Step 3: Cross multiply
    123,881.04x = 170,643.24 × 99,940.68
  4. Step 4: Simplify right side
    123,881.04x = 17,054,201,443.00
  5. Step 5: Solve for x
    x = 17,054,201,443.00/123,881.04
  6. Step 6: Final answer
    x = 137,665.95

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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.