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Finding the Fourth Proportional to 231,405.39, 319,335.21 and 130,803.39

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Solution

The fourth proportional to 231,405.39, 319,335.21 and 130,803.39 is: 180,506.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,405.39 : 319,335.21 = 130,803.39 : x
  2. Step 2: Convert to fraction form
    231,405.39/319,335.21 = 130,803.39/x
  3. Step 3: Cross multiply
    231,405.39x = 319,335.21 × 130,803.39
  4. Step 4: Simplify right side
    231,405.39x = 41,770,128,014.36
  5. Step 5: Solve for x
    x = 41,770,128,014.36/231,405.39
  6. Step 6: Final answer
    x = 180,506.29

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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.