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Finding the Fourth Proportional to 100,962.72, 139,334.64 and 55,640.58

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Solution

The fourth proportional to 100,962.72, 139,334.64 and 55,640.58 is: 76,787.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,962.72 : 139,334.64 = 55,640.58 : x
  2. Step 2: Convert to fraction form
    100,962.72/139,334.64 = 55,640.58/x
  3. Step 3: Cross multiply
    100,962.72x = 139,334.64 × 55,640.58
  4. Step 4: Simplify right side
    100,962.72x = 7,752,660,183.69
  5. Step 5: Solve for x
    x = 7,752,660,183.69/100,962.72
  6. Step 6: Final answer
    x = 76,787.35

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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.