Home / 120,185,969.89-180,278,674.52-78,947,155.12

Finding the Fourth Proportional to 120,185,969.89, 180,278,674.52 and 78,947,155.12

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Solution

The fourth proportional to 120,185,969.89, 180,278,674.52 and 78,947,155.12 is: 118,420,548.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,185,969.89 : 180,278,674.52 = 78,947,155.12 : x
  2. Step 2: Convert to fraction form
    120,185,969.89/180,278,674.52 = 78,947,155.12/x
  3. Step 3: Cross multiply
    120,185,969.89x = 180,278,674.52 × 78,947,155.12
  4. Step 4: Simplify right side
    120,185,969.89x = 14,232,488,481,735,718
  5. Step 5: Solve for x
    x = 14,232,488,481,735,718/120,185,969.89
  6. Step 6: Final answer
    x = 118,420,548.55

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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.