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Finding the Fourth Proportional to 123,326.64, 170,000.64 and 100,625.58

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Solution

The fourth proportional to 123,326.64, 170,000.64 and 100,625.58 is: 138,708.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,326.64 : 170,000.64 = 100,625.58 : x
  2. Step 2: Convert to fraction form
    123,326.64/170,000.64 = 100,625.58/x
  3. Step 3: Cross multiply
    123,326.64x = 170,000.64 × 100,625.58
  4. Step 4: Simplify right side
    123,326.64x = 17,106,413,000.37
  5. Step 5: Solve for x
    x = 17,106,413,000.37/123,326.64
  6. Step 6: Final answer
    x = 138,708.17

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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.