Home / 78,408,086.40-117,612,129.60-75,432,016.80

Finding the Fourth Proportional to 78,408,086.40, 117,612,129.60 and 75,432,016.80

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Solution

The fourth proportional to 78,408,086.40, 117,612,129.60 and 75,432,016.80 is: 113,148,025.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,408,086.40 : 117,612,129.60 = 75,432,016.80 : x
  2. Step 2: Convert to fraction form
    78,408,086.40/117,612,129.60 = 75,432,016.80/x
  3. Step 3: Cross multiply
    78,408,086.40x = 117,612,129.60 × 75,432,016.80
  4. Step 4: Simplify right side
    78,408,086.40x = 8,871,720,135,870,976
  5. Step 5: Solve for x
    x = 8,871,720,135,870,976/78,408,086.40
  6. Step 6: Final answer
    x = 113,148,025.20

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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.