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Finding the Fourth Proportional to 77,317.52, 106,699.56 and 43,790.48

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Solution

The fourth proportional to 77,317.52, 106,699.56 and 43,790.48 is: 60,431.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,317.52 : 106,699.56 = 43,790.48 : x
  2. Step 2: Convert to fraction form
    77,317.52/106,699.56 = 43,790.48/x
  3. Step 3: Cross multiply
    77,317.52x = 106,699.56 × 43,790.48
  4. Step 4: Simplify right side
    77,317.52x = 4,672,424,948.19
  5. Step 5: Solve for x
    x = 4,672,424,948.19/77,317.52
  6. Step 6: Final answer
    x = 60,431.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.