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Finding the Fourth Proportional to 236,782.88, 355,135.98 and 86,986.34

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Solution

The fourth proportional to 236,782.88, 355,135.98 and 86,986.34 is: 130,465.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,782.88 : 355,135.98 = 86,986.34 : x
  2. Step 2: Convert to fraction form
    236,782.88/355,135.98 = 86,986.34/x
  3. Step 3: Cross multiply
    236,782.88x = 355,135.98 × 86,986.34
  4. Step 4: Simplify right side
    236,782.88x = 30,891,979,102.51
  5. Step 5: Solve for x
    x = 30,891,979,102.51/236,782.88
  6. Step 6: Final answer
    x = 130,465.43

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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.