Home / 120,185,969.86-180,278,674.47-78,947,155.09

Finding the Fourth Proportional to 120,185,969.86, 180,278,674.47 and 78,947,155.09

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Solution

The fourth proportional to 120,185,969.86, 180,278,674.47 and 78,947,155.09 is: 118,420,548.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,185,969.86 : 180,278,674.47 = 78,947,155.09 : x
  2. Step 2: Convert to fraction form
    120,185,969.86/180,278,674.47 = 78,947,155.09/x
  3. Step 3: Cross multiply
    120,185,969.86x = 180,278,674.47 × 78,947,155.09
  4. Step 4: Simplify right side
    120,185,969.86x = 14,232,488,472,352,018
  5. Step 5: Solve for x
    x = 14,232,488,472,352,018/120,185,969.86
  6. Step 6: Final answer
    x = 118,420,548.50

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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.