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Finding the Fourth Proportional to 115,136.40, 172,728.90 and 36,258.60

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Solution

The fourth proportional to 115,136.40, 172,728.90 and 36,258.60 is: 54,395.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,136.40 : 172,728.90 = 36,258.60 : x
  2. Step 2: Convert to fraction form
    115,136.40/172,728.90 = 36,258.60/x
  3. Step 3: Cross multiply
    115,136.40x = 172,728.90 × 36,258.60
  4. Step 4: Simplify right side
    115,136.40x = 6,262,908,093.54
  5. Step 5: Solve for x
    x = 6,262,908,093.54/115,136.40
  6. Step 6: Final answer
    x = 54,395.55

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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.