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Finding the Fourth Proportional to 259,129.90, 388,807.71 and 90,771.22

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Solution

The fourth proportional to 259,129.90, 388,807.71 and 90,771.22 is: 136,196.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,129.90 : 388,807.71 = 90,771.22 : x
  2. Step 2: Convert to fraction form
    259,129.90/388,807.71 = 90,771.22/x
  3. Step 3: Cross multiply
    259,129.90x = 388,807.71 × 90,771.22
  4. Step 4: Simplify right side
    259,129.90x = 35,292,550,182.11
  5. Step 5: Solve for x
    x = 35,292,550,182.11/259,129.90
  6. Step 6: Final answer
    x = 136,196.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.