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Finding the Fourth Proportional to 112,785.44, 155,638.12 and 65,035.92

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Solution

The fourth proportional to 112,785.44, 155,638.12 and 65,035.92 is: 89,746.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,785.44 : 155,638.12 = 65,035.92 : x
  2. Step 2: Convert to fraction form
    112,785.44/155,638.12 = 65,035.92/x
  3. Step 3: Cross multiply
    112,785.44x = 155,638.12 × 65,035.92
  4. Step 4: Simplify right side
    112,785.44x = 10,122,068,321.27
  5. Step 5: Solve for x
    x = 10,122,068,321.27/112,785.44
  6. Step 6: Final answer
    x = 89,746.23

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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.