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Finding the Fourth Proportional to 66,923.60, 100,270.20 and 31,787.60

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Solution

The fourth proportional to 66,923.60, 100,270.20 and 31,787.60 is: 47,626.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,923.60 : 100,270.20 = 31,787.60 : x
  2. Step 2: Convert to fraction form
    66,923.60/100,270.20 = 31,787.60/x
  3. Step 3: Cross multiply
    66,923.60x = 100,270.20 × 31,787.60
  4. Step 4: Simplify right side
    66,923.60x = 3,187,349,009.52
  5. Step 5: Solve for x
    x = 3,187,349,009.52/66,923.60
  6. Step 6: Final answer
    x = 47,626.68

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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.