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Finding the Fourth Proportional to 259,076.61, 388,628.82 and 81,597.51

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Solution

The fourth proportional to 259,076.61, 388,628.82 and 81,597.51 is: 122,400.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,076.61 : 388,628.82 = 81,597.51 : x
  2. Step 2: Convert to fraction form
    259,076.61/388,628.82 = 81,597.51/x
  3. Step 3: Cross multiply
    259,076.61x = 388,628.82 × 81,597.51
  4. Step 4: Simplify right side
    259,076.61x = 31,711,144,026.24
  5. Step 5: Solve for x
    x = 31,711,144,026.24/259,076.61
  6. Step 6: Final answer
    x = 122,400.64

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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.