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Finding the Fourth Proportional to 258,880.72, 388,325.96 and 71,897.08

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Solution

The fourth proportional to 258,880.72, 388,325.96 and 71,897.08 is: 107,846.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,880.72 : 388,325.96 = 71,897.08 : x
  2. Step 2: Convert to fraction form
    258,880.72/388,325.96 = 71,897.08/x
  3. Step 3: Cross multiply
    258,880.72x = 388,325.96 × 71,897.08
  4. Step 4: Simplify right side
    258,880.72x = 27,919,502,252.71
  5. Step 5: Solve for x
    x = 27,919,502,252.71/258,880.72
  6. Step 6: Final answer
    x = 107,846.97

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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.