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Finding the Fourth Proportional to 78,652.53, 117,996.08 and 57,812.85

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Solution

The fourth proportional to 78,652.53, 117,996.08 and 57,812.85 is: 86,731.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,652.53 : 117,996.08 = 57,812.85 : x
  2. Step 2: Convert to fraction form
    78,652.53/117,996.08 = 57,812.85/x
  3. Step 3: Cross multiply
    78,652.53x = 117,996.08 × 57,812.85
  4. Step 4: Simplify right side
    78,652.53x = 6,821,689,384.56
  5. Step 5: Solve for x
    x = 6,821,689,384.56/78,652.53
  6. Step 6: Final answer
    x = 86,731.98

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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.