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Finding the Fourth Proportional to 172,564.40, 258,943.80 and 67,369.70

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Solution

The fourth proportional to 172,564.40, 258,943.80 and 67,369.70 is: 101,092.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,564.40 : 258,943.80 = 67,369.70 : x
  2. Step 2: Convert to fraction form
    172,564.40/258,943.80 = 67,369.70/x
  3. Step 3: Cross multiply
    172,564.40x = 258,943.80 × 67,369.70
  4. Step 4: Simplify right side
    172,564.40x = 17,444,966,122.86
  5. Step 5: Solve for x
    x = 17,444,966,122.86/172,564.40
  6. Step 6: Final answer
    x = 101,092.50

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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.