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Finding the Fourth Proportional to 236,775, 326,745.40 and 129,342.28

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Solution

The fourth proportional to 236,775, 326,745.40 and 129,342.28 is: 178,490.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,775 : 326,745.40 = 129,342.28 : x
  2. Step 2: Convert to fraction form
    236,775/326,745.40 = 129,342.28/x
  3. Step 3: Cross multiply
    236,775x = 326,745.40 × 129,342.28
  4. Step 4: Simplify right side
    236,775x = 42,261,995,015.51
  5. Step 5: Solve for x
    x = 42,261,995,015.51/236,775
  6. Step 6: Final answer
    x = 178,490.11

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1.5x scale

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.