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Finding the Fourth Proportional to 85,794.34, 128,647.63 and 35,860.81

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Solution

The fourth proportional to 85,794.34, 128,647.63 and 35,860.81 is: 53,772.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,794.34 : 128,647.63 = 35,860.81 : x
  2. Step 2: Convert to fraction form
    85,794.34/128,647.63 = 35,860.81/x
  3. Step 3: Cross multiply
    85,794.34x = 128,647.63 × 35,860.81
  4. Step 4: Simplify right side
    85,794.34x = 4,613,408,216.38
  5. Step 5: Solve for x
    x = 4,613,408,216.38/85,794.34
  6. Step 6: Final answer
    x = 53,772.87

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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.