Home / 120,185,986.08-180,278,698.72-78,947,171.28

Finding the Fourth Proportional to 120,185,986.08, 180,278,698.72 and 78,947,171.28

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Solution

The fourth proportional to 120,185,986.08, 180,278,698.72 and 78,947,171.28 is: 118,420,572.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,185,986.08 : 180,278,698.72 = 78,947,171.28 : x
  2. Step 2: Convert to fraction form
    120,185,986.08/180,278,698.72 = 78,947,171.28/x
  3. Step 3: Cross multiply
    120,185,986.08x = 180,278,698.72 × 78,947,171.28
  4. Step 4: Simplify right side
    120,185,986.08x = 14,232,493,305,983,356
  5. Step 5: Solve for x
    x = 14,232,493,305,983,356/120,185,986.08
  6. Step 6: Final answer
    x = 118,420,572.73

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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.