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Finding the Fourth Proportional to 260,339.56, 390,063.52 and 142,093.88

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Solution

The fourth proportional to 260,339.56, 390,063.52 and 142,093.88 is: 212,897.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,339.56 : 390,063.52 = 142,093.88 : x
  2. Step 2: Convert to fraction form
    260,339.56/390,063.52 = 142,093.88/x
  3. Step 3: Cross multiply
    260,339.56x = 390,063.52 × 142,093.88
  4. Step 4: Simplify right side
    260,339.56x = 55,425,639,003.26
  5. Step 5: Solve for x
    x = 55,425,639,003.26/260,339.56
  6. Step 6: Final answer
    x = 212,897.49

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