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Finding the Fourth Proportional to 56,916.74, 85,365.48 and 20,885.78

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Solution

The fourth proportional to 56,916.74, 85,365.48 and 20,885.78 is: 31,325.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,916.74 : 85,365.48 = 20,885.78 : x
  2. Step 2: Convert to fraction form
    56,916.74/85,365.48 = 20,885.78/x
  3. Step 3: Cross multiply
    56,916.74x = 85,365.48 × 20,885.78
  4. Step 4: Simplify right side
    56,916.74x = 1,782,924,634.87
  5. Step 5: Solve for x
    x = 1,782,924,634.87/56,916.74
  6. Step 6: Final answer
    x = 31,325.14

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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.