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Finding the Fourth Proportional to 70,640.64, 105,961.05 and 18,050.18

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Solution

The fourth proportional to 70,640.64, 105,961.05 and 18,050.18 is: 27,075.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,640.64 : 105,961.05 = 18,050.18 : x
  2. Step 2: Convert to fraction form
    70,640.64/105,961.05 = 18,050.18/x
  3. Step 3: Cross multiply
    70,640.64x = 105,961.05 × 18,050.18
  4. Step 4: Simplify right side
    70,640.64x = 1,912,615,495.68
  5. Step 5: Solve for x
    x = 1,912,615,495.68/70,640.64
  6. Step 6: Final answer
    x = 27,075.29

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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.