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Finding the Fourth Proportional to 92,856, 128,157.48 and 55,129.44

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Solution

The fourth proportional to 92,856, 128,157.48 and 55,129.44 is: 76,088.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,856 : 128,157.48 = 55,129.44 : x
  2. Step 2: Convert to fraction form
    92,856/128,157.48 = 55,129.44/x
  3. Step 3: Cross multiply
    92,856x = 128,157.48 × 55,129.44
  4. Step 4: Simplify right side
    92,856x = 7,065,250,104.21
  5. Step 5: Solve for x
    x = 7,065,250,104.21/92,856
  6. Step 6: Final answer
    x = 76,088.25

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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.