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Finding the Fourth Proportional to 66,737.70, 100,107.81 and 31,189.28

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Solution

The fourth proportional to 66,737.70, 100,107.81 and 31,189.28 is: 46,784.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,737.70 : 100,107.81 = 31,189.28 : x
  2. Step 2: Convert to fraction form
    66,737.70/100,107.81 = 31,189.28/x
  3. Step 3: Cross multiply
    66,737.70x = 100,107.81 × 31,189.28
  4. Step 4: Simplify right side
    66,737.70x = 3,122,290,015.74
  5. Step 5: Solve for x
    x = 3,122,290,015.74/66,737.70
  6. Step 6: Final answer
    x = 46,784.50

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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.