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Finding the Fourth Proportional to 112,785.09, 155,633.09 and 65,029.22

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Solution

The fourth proportional to 112,785.09, 155,633.09 and 65,029.22 is: 89,734.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,785.09 : 155,633.09 = 65,029.22 : x
  2. Step 2: Convert to fraction form
    112,785.09/155,633.09 = 65,029.22/x
  3. Step 3: Cross multiply
    112,785.09x = 155,633.09 × 65,029.22
  4. Step 4: Simplify right side
    112,785.09x = 10,120,697,345.58
  5. Step 5: Solve for x
    x = 10,120,697,345.58/112,785.09
  6. Step 6: Final answer
    x = 89,734.36

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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.