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Finding the Fourth Proportional to 112,600.64, 155,408.16 and 64,845.44

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Solution

The fourth proportional to 112,600.64, 155,408.16 and 64,845.44 is: 89,497.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,600.64 : 155,408.16 = 64,845.44 : x
  2. Step 2: Convert to fraction form
    112,600.64/155,408.16 = 64,845.44/x
  3. Step 3: Cross multiply
    112,600.64x = 155,408.16 × 64,845.44
  4. Step 4: Simplify right side
    112,600.64x = 10,077,510,514.79
  5. Step 5: Solve for x
    x = 10,077,510,514.79/112,600.64
  6. Step 6: Final answer
    x = 89,497.81

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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.