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Finding the Fourth Proportional to 99,931.31, 137,907.02 and 54,611.21

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Solution

The fourth proportional to 99,931.31, 137,907.02 and 54,611.21 is: 75,364.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,931.31 : 137,907.02 = 54,611.21 : x
  2. Step 2: Convert to fraction form
    99,931.31/137,907.02 = 54,611.21/x
  3. Step 3: Cross multiply
    99,931.31x = 137,907.02 × 54,611.21
  4. Step 4: Simplify right side
    99,931.31x = 7,531,268,628.07
  5. Step 5: Solve for x
    x = 7,531,268,628.07/99,931.31
  6. Step 6: Final answer
    x = 75,364.45

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