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Finding the Fourth Proportional to 128,990.58, 193,411.14 and 50,012.34

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Solution

The fourth proportional to 128,990.58, 193,411.14 and 50,012.34 is: 74,989.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,990.58 : 193,411.14 = 50,012.34 : x
  2. Step 2: Convert to fraction form
    128,990.58/193,411.14 = 50,012.34/x
  3. Step 3: Cross multiply
    128,990.58x = 193,411.14 × 50,012.34
  4. Step 4: Simplify right side
    128,990.58x = 9,672,943,693.47
  5. Step 5: Solve for x
    x = 9,672,943,693.47/128,990.58
  6. Step 6: Final answer
    x = 74,989.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.