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Finding the Fourth Proportional to 173,721.90, 260,437.05 and 90,615.90

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Solution

The fourth proportional to 173,721.90, 260,437.05 and 90,615.90 is: 135,847.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,721.90 : 260,437.05 = 90,615.90 : x
  2. Step 2: Convert to fraction form
    173,721.90/260,437.05 = 90,615.90/x
  3. Step 3: Cross multiply
    173,721.90x = 260,437.05 × 90,615.90
  4. Step 4: Simplify right side
    173,721.90x = 23,599,737,679.10
  5. Step 5: Solve for x
    x = 23,599,737,679.10/173,721.90
  6. Step 6: Final answer
    x = 135,847.80

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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.