Home / 78,740.22-118,165.68-71,211.46

Finding the Fourth Proportional to 78,740.22, 118,165.68 and 71,211.46

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Solution

The fourth proportional to 78,740.22, 118,165.68 and 71,211.46 is: 106,867.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,740.22 : 118,165.68 = 71,211.46 : x
  2. Step 2: Convert to fraction form
    78,740.22/118,165.68 = 71,211.46/x
  3. Step 3: Cross multiply
    78,740.22x = 118,165.68 × 71,211.46
  4. Step 4: Simplify right side
    78,740.22x = 8,414,750,594.69
  5. Step 5: Solve for x
    x = 8,414,750,594.69/78,740.22
  6. Step 6: Final answer
    x = 106,867.25

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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.