Home / 80,219,860.40-120,133,546.14-72,456,214.52

Finding the Fourth Proportional to 80,219,860.40, 120,133,546.14 and 72,456,214.52

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Solution

The fourth proportional to 80,219,860.40, 120,133,546.14 and 72,456,214.52 is: 108,507,069.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,219,860.40 : 120,133,546.14 = 72,456,214.52 : x
  2. Step 2: Convert to fraction form
    80,219,860.40/120,133,546.14 = 72,456,214.52/x
  3. Step 3: Cross multiply
    80,219,860.40x = 120,133,546.14 × 72,456,214.52
  4. Step 4: Simplify right side
    80,219,860.40x = 8,704,421,990,168,157
  5. Step 5: Solve for x
    x = 8,704,421,990,168,157/80,219,860.40
  6. Step 6: Final answer
    x = 108,507,069.78

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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.