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Finding the Fourth Proportional to 112,374.80, 168,562.20 and 67,978.70

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Solution

The fourth proportional to 112,374.80, 168,562.20 and 67,978.70 is: 101,968.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,374.80 : 168,562.20 = 67,978.70 : x
  2. Step 2: Convert to fraction form
    112,374.80/168,562.20 = 67,978.70/x
  3. Step 3: Cross multiply
    112,374.80x = 168,562.20 × 67,978.70
  4. Step 4: Simplify right side
    112,374.80x = 11,458,639,225.14
  5. Step 5: Solve for x
    x = 11,458,639,225.14/112,374.80
  6. Step 6: Final answer
    x = 101,968.05

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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.