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Finding the Fourth Proportional to 85,926.36, 128,911.86 and 26,763

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Solution

The fourth proportional to 85,926.36, 128,911.86 and 26,763 is: 40,151.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,926.36 : 128,911.86 = 26,763 : x
  2. Step 2: Convert to fraction form
    85,926.36/128,911.86 = 26,763/x
  3. Step 3: Cross multiply
    85,926.36x = 128,911.86 × 26,763
  4. Step 4: Simplify right side
    85,926.36x = 3,450,068,109.18
  5. Step 5: Solve for x
    x = 3,450,068,109.18/85,926.36
  6. Step 6: Final answer
    x = 40,151.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.