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Finding the Fourth Proportional to 72,911, 109,366.50 and 23,663

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Solution

The fourth proportional to 72,911, 109,366.50 and 23,663 is: 35,494.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,911 : 109,366.50 = 23,663 : x
  2. Step 2: Convert to fraction form
    72,911/109,366.50 = 23,663/x
  3. Step 3: Cross multiply
    72,911x = 109,366.50 × 23,663
  4. Step 4: Simplify right side
    72,911x = 2,587,939,489.50
  5. Step 5: Solve for x
    x = 2,587,939,489.50/72,911
  6. Step 6: Final answer
    x = 35,494.50

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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.