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Finding the Fourth Proportional to 92,807.22, 128,007.77 and 85,175.09

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Solution

The fourth proportional to 92,807.22, 128,007.77 and 85,175.09 is: 117,480.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,807.22 : 128,007.77 = 85,175.09 : x
  2. Step 2: Convert to fraction form
    92,807.22/128,007.77 = 85,175.09/x
  3. Step 3: Cross multiply
    92,807.22x = 128,007.77 × 85,175.09
  4. Step 4: Simplify right side
    92,807.22x = 10,903,073,330.45
  5. Step 5: Solve for x
    x = 10,903,073,330.45/92,807.22
  6. Step 6: Final answer
    x = 117,480.87

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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.