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Finding the Fourth Proportional to 109,940.70, 164,911.05 and 74,948.70

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Solution

The fourth proportional to 109,940.70, 164,911.05 and 74,948.70 is: 112,423.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,940.70 : 164,911.05 = 74,948.70 : x
  2. Step 2: Convert to fraction form
    109,940.70/164,911.05 = 74,948.70/x
  3. Step 3: Cross multiply
    109,940.70x = 164,911.05 × 74,948.70
  4. Step 4: Simplify right side
    109,940.70x = 12,359,868,813.14
  5. Step 5: Solve for x
    x = 12,359,868,813.14/109,940.70
  6. Step 6: Final answer
    x = 112,423.05

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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.