Home / 120,185,973.05-180,278,679.25-78,947,158.28

Finding the Fourth Proportional to 120,185,973.05, 180,278,679.25 and 78,947,158.28

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Solution

The fourth proportional to 120,185,973.05, 180,278,679.25 and 78,947,158.28 is: 118,420,553.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,185,973.05 : 180,278,679.25 = 78,947,158.28 : x
  2. Step 2: Convert to fraction form
    120,185,973.05/180,278,679.25 = 78,947,158.28/x
  3. Step 3: Cross multiply
    120,185,973.05x = 180,278,679.25 × 78,947,158.28
  4. Step 4: Simplify right side
    120,185,973.05x = 14,232,489,424,456,394
  5. Step 5: Solve for x
    x = 14,232,489,424,456,394/120,185,973.05
  6. Step 6: Final answer
    x = 118,420,553.28

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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.