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Finding the Fourth Proportional to 99,428.98, 137,213.81 and 54,716.02

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Solution

The fourth proportional to 99,428.98, 137,213.81 and 54,716.02 is: 75,509.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,428.98 : 137,213.81 = 54,716.02 : x
  2. Step 2: Convert to fraction form
    99,428.98/137,213.81 = 54,716.02/x
  3. Step 3: Cross multiply
    99,428.98x = 137,213.81 × 54,716.02
  4. Step 4: Simplify right side
    99,428.98x = 7,507,793,572.24
  5. Step 5: Solve for x
    x = 7,507,793,572.24/99,428.98
  6. Step 6: Final answer
    x = 75,509.11

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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.