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Finding the Fourth Proportional to 138,330.53, 190,893.53 and 84,611.60

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Solution

The fourth proportional to 138,330.53, 190,893.53 and 84,611.60 is: 116,762.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,330.53 : 190,893.53 = 84,611.60 : x
  2. Step 2: Convert to fraction form
    138,330.53/190,893.53 = 84,611.60/x
  3. Step 3: Cross multiply
    138,330.53x = 190,893.53 × 84,611.60
  4. Step 4: Simplify right side
    138,330.53x = 16,151,806,260.01
  5. Step 5: Solve for x
    x = 16,151,806,260.01/138,330.53
  6. Step 6: Final answer
    x = 116,762.42

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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.