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Finding the Fourth Proportional to 81,447.89, 122,096.66 and 56,499.71

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Solution

The fourth proportional to 81,447.89, 122,096.66 and 56,499.71 is: 84,697.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,447.89 : 122,096.66 = 56,499.71 : x
  2. Step 2: Convert to fraction form
    81,447.89/122,096.66 = 56,499.71/x
  3. Step 3: Cross multiply
    81,447.89x = 122,096.66 × 56,499.71
  4. Step 4: Simplify right side
    81,447.89x = 6,898,424,988.99
  5. Step 5: Solve for x
    x = 6,898,424,988.99/81,447.89
  6. Step 6: Final answer
    x = 84,697.41

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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.