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Finding the Fourth Proportional to 235,705.47, 325,267.32 and 128,273.20

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Solution

The fourth proportional to 235,705.47, 325,267.32 and 128,273.20 is: 177,013.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,705.47 : 325,267.32 = 128,273.20 : x
  2. Step 2: Convert to fraction form
    235,705.47/325,267.32 = 128,273.20/x
  3. Step 3: Cross multiply
    235,705.47x = 325,267.32 × 128,273.20
  4. Step 4: Simplify right side
    235,705.47x = 41,723,077,724.12
  5. Step 5: Solve for x
    x = 41,723,077,724.12/235,705.47
  6. Step 6: Final answer
    x = 177,013.62

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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.