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Finding the Fourth Proportional to 236,368.95, 326,188.59 and 128,939.00

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Solution

The fourth proportional to 236,368.95, 326,188.59 and 128,939.00 is: 177,935.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,368.95 : 326,188.59 = 128,939.00 : x
  2. Step 2: Convert to fraction form
    236,368.95/326,188.59 = 128,939.00/x
  3. Step 3: Cross multiply
    236,368.95x = 326,188.59 × 128,939.00
  4. Step 4: Simplify right side
    236,368.95x = 42,058,428,975.07
  5. Step 5: Solve for x
    x = 42,058,428,975.07/236,368.95
  6. Step 6: Final answer
    x = 177,935.51

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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.