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Finding the Fourth Proportional to 91,138.60, 125,772.37 and 52,907

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Solution

The fourth proportional to 91,138.60, 125,772.37 and 52,907 is: 73,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,138.60 : 125,772.37 = 52,907 : x
  2. Step 2: Convert to fraction form
    91,138.60/125,772.37 = 52,907/x
  3. Step 3: Cross multiply
    91,138.60x = 125,772.37 × 52,907
  4. Step 4: Simplify right side
    91,138.60x = 6,654,238,515.06
  5. Step 5: Solve for x
    x = 6,654,238,515.06/91,138.60
  6. Step 6: Final answer
    x = 73,012.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.