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Finding the Fourth Proportional to 85,650.86, 128,488.64 and 26,491.14

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Solution

The fourth proportional to 85,650.86, 128,488.64 and 26,491.14 is: 39,740.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,650.86 : 128,488.64 = 26,491.14 : x
  2. Step 2: Convert to fraction form
    85,650.86/128,488.64 = 26,491.14/x
  3. Step 3: Cross multiply
    85,650.86x = 128,488.64 × 26,491.14
  4. Step 4: Simplify right side
    85,650.86x = 3,403,810,418.19
  5. Step 5: Solve for x
    x = 3,403,810,418.19/85,650.86
  6. Step 6: Final answer
    x = 39,740.53

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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.