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Finding the Fourth Proportional to 235,918.50, 325,562.67 and 128,490.42

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Solution

The fourth proportional to 235,918.50, 325,562.67 and 128,490.42 is: 177,314.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,918.50 : 325,562.67 = 128,490.42 : x
  2. Step 2: Convert to fraction form
    235,918.50/325,562.67 = 128,490.42/x
  3. Step 3: Cross multiply
    235,918.50x = 325,562.67 × 128,490.42
  4. Step 4: Simplify right side
    235,918.50x = 41,831,684,204.62
  5. Step 5: Solve for x
    x = 41,831,684,204.62/235,918.50
  6. Step 6: Final answer
    x = 177,314.13

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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.