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Finding the Fourth Proportional to 97,906.20, 146,859.30 and 78,223.20

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Solution

The fourth proportional to 97,906.20, 146,859.30 and 78,223.20 is: 117,334.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,906.20 : 146,859.30 = 78,223.20 : x
  2. Step 2: Convert to fraction form
    97,906.20/146,859.30 = 78,223.20/x
  3. Step 3: Cross multiply
    97,906.20x = 146,859.30 × 78,223.20
  4. Step 4: Simplify right side
    97,906.20x = 11,487,804,395.76
  5. Step 5: Solve for x
    x = 11,487,804,395.76/97,906.20
  6. Step 6: Final answer
    x = 117,334.80

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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.