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Finding the Fourth Proportional to 235,470.87, 324,951.49 and 128,040.13

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Solution

The fourth proportional to 235,470.87, 324,951.49 and 128,040.13 is: 176,696.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,470.87 : 324,951.49 = 128,040.13 : x
  2. Step 2: Convert to fraction form
    235,470.87/324,951.49 = 128,040.13/x
  3. Step 3: Cross multiply
    235,470.87x = 324,951.49 × 128,040.13
  4. Step 4: Simplify right side
    235,470.87x = 41,606,831,023.29
  5. Step 5: Solve for x
    x = 41,606,831,023.29/235,470.87
  6. Step 6: Final answer
    x = 176,696.30

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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.