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Finding the Fourth Proportional to 109,645.78, 151,312.42 and 64,324.54

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Solution

The fourth proportional to 109,645.78, 151,312.42 and 64,324.54 is: 88,768.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,645.78 : 151,312.42 = 64,324.54 : x
  2. Step 2: Convert to fraction form
    109,645.78/151,312.42 = 64,324.54/x
  3. Step 3: Cross multiply
    109,645.78x = 151,312.42 × 64,324.54
  4. Step 4: Simplify right side
    109,645.78x = 9,733,100,734.60
  5. Step 5: Solve for x
    x = 9,733,100,734.60/109,645.78
  6. Step 6: Final answer
    x = 88,768.58

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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.