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Finding the Fourth Proportional to 109,868.20, 164,802.30 and 90,841.30

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Solution

The fourth proportional to 109,868.20, 164,802.30 and 90,841.30 is: 136,261.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,868.20 : 164,802.30 = 90,841.30 : x
  2. Step 2: Convert to fraction form
    109,868.20/164,802.30 = 90,841.30/x
  3. Step 3: Cross multiply
    109,868.20x = 164,802.30 × 90,841.30
  4. Step 4: Simplify right side
    109,868.20x = 14,970,855,174.99
  5. Step 5: Solve for x
    x = 14,970,855,174.99/109,868.20
  6. Step 6: Final answer
    x = 136,261.95

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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.