Home / 120,180,659.40-180,270,989.10-78,568,829.10

Finding the Fourth Proportional to 120,180,659.40, 180,270,989.10 and 78,568,829.10

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Solution

The fourth proportional to 120,180,659.40, 180,270,989.10 and 78,568,829.10 is: 117,853,243.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,180,659.40 : 180,270,989.10 = 78,568,829.10 : x
  2. Step 2: Convert to fraction form
    120,180,659.40/180,270,989.10 = 78,568,829.10/x
  3. Step 3: Cross multiply
    120,180,659.40x = 180,270,989.10 × 78,568,829.10
  4. Step 4: Simplify right side
    120,180,659.40x = 14,163,680,534,285,862
  5. Step 5: Solve for x
    x = 14,163,680,534,285,862/120,180,659.40
  6. Step 6: Final answer
    x = 117,853,243.65

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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.