Home / 80,256,019.20-120,384,028.80-79,808,121.60

Finding the Fourth Proportional to 80,256,019.20, 120,384,028.80 and 79,808,121.60

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Solution

The fourth proportional to 80,256,019.20, 120,384,028.80 and 79,808,121.60 is: 119,712,182.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,256,019.20 : 120,384,028.80 = 79,808,121.60 : x
  2. Step 2: Convert to fraction form
    80,256,019.20/120,384,028.80 = 79,808,121.60/x
  3. Step 3: Cross multiply
    80,256,019.20x = 120,384,028.80 × 79,808,121.60
  4. Step 4: Simplify right side
    80,256,019.20x = 9,607,623,209,168,302
  5. Step 5: Solve for x
    x = 9,607,623,209,168,302/80,256,019.20
  6. Step 6: Final answer
    x = 119,712,182.40

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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.