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Finding the Fourth Proportional to 259,071.88, 388,621.70 and 81,592.72

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Solution

The fourth proportional to 259,071.88, 388,621.70 and 81,592.72 is: 122,393.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,071.88 : 388,621.70 = 81,592.72 : x
  2. Step 2: Convert to fraction form
    259,071.88/388,621.70 = 81,592.72/x
  3. Step 3: Cross multiply
    259,071.88x = 388,621.70 × 81,592.72
  4. Step 4: Simplify right side
    259,071.88x = 31,708,701,554.02
  5. Step 5: Solve for x
    x = 31,708,701,554.02/259,071.88
  6. Step 6: Final answer
    x = 122,393.45

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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.