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Finding the Fourth Proportional to 72,086.62, 108,153.06 and 34,649.40

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Solution

The fourth proportional to 72,086.62, 108,153.06 and 34,649.40 is: 51,985.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,086.62 : 108,153.06 = 34,649.40 : x
  2. Step 2: Convert to fraction form
    72,086.62/108,153.06 = 34,649.40/x
  3. Step 3: Cross multiply
    72,086.62x = 108,153.06 × 34,649.40
  4. Step 4: Simplify right side
    72,086.62x = 3,747,438,637.16
  5. Step 5: Solve for x
    x = 3,747,438,637.16/72,086.62
  6. Step 6: Final answer
    x = 51,985.22

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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.