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Finding the Fourth Proportional to 109,435.70, 164,153.55 and 74,443.70

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Solution

The fourth proportional to 109,435.70, 164,153.55 and 74,443.70 is: 111,665.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,435.70 : 164,153.55 = 74,443.70 : x
  2. Step 2: Convert to fraction form
    109,435.70/164,153.55 = 74,443.70/x
  3. Step 3: Cross multiply
    109,435.70x = 164,153.55 × 74,443.70
  4. Step 4: Simplify right side
    109,435.70x = 12,220,197,630.14
  5. Step 5: Solve for x
    x = 12,220,197,630.14/109,435.70
  6. Step 6: Final answer
    x = 111,665.55

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1.5x scale

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.