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Finding the Fourth Proportional to 99,428.63, 137,211.53 and 54,716.63

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Solution

The fourth proportional to 99,428.63, 137,211.53 and 54,716.63 is: 75,508.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,428.63 : 137,211.53 = 54,716.63 : x
  2. Step 2: Convert to fraction form
    99,428.63/137,211.53 = 54,716.63/x
  3. Step 3: Cross multiply
    99,428.63x = 137,211.53 × 54,716.63
  4. Step 4: Simplify right side
    99,428.63x = 7,507,752,518.74
  5. Step 5: Solve for x
    x = 7,507,752,518.74/99,428.63
  6. Step 6: Final answer
    x = 75,508.96

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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.