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Finding the Fourth Proportional to 81,720.83, 112,768.96 and 45,916.22

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Solution

The fourth proportional to 81,720.83, 112,768.96 and 45,916.22 is: 63,361.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,720.83 : 112,768.96 = 45,916.22 : x
  2. Step 2: Convert to fraction form
    81,720.83/112,768.96 = 45,916.22/x
  3. Step 3: Cross multiply
    81,720.83x = 112,768.96 × 45,916.22
  4. Step 4: Simplify right side
    81,720.83x = 5,177,924,376.53
  5. Step 5: Solve for x
    x = 5,177,924,376.53/81,720.83
  6. Step 6: Final answer
    x = 63,361.13

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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.