Home / 120,163,619.20-180,245,428.80-79,774,103.20

Finding the Fourth Proportional to 120,163,619.20, 180,245,428.80 and 79,774,103.20

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Solution

The fourth proportional to 120,163,619.20, 180,245,428.80 and 79,774,103.20 is: 119,661,154.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,163,619.20 : 180,245,428.80 = 79,774,103.20 : x
  2. Step 2: Convert to fraction form
    120,163,619.20/180,245,428.80 = 79,774,103.20/x
  3. Step 3: Cross multiply
    120,163,619.20x = 180,245,428.80 × 79,774,103.20
  4. Step 4: Simplify right side
    120,163,619.20x = 14,378,917,438,419,454
  5. Step 5: Solve for x
    x = 14,378,917,438,419,454/120,163,619.20
  6. Step 6: Final answer
    x = 119,661,154.80

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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.