Home / 78,418,009.80-117,627,014.70-74,890,816.20

Finding the Fourth Proportional to 78,418,009.80, 117,627,014.70 and 74,890,816.20

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Solution

The fourth proportional to 78,418,009.80, 117,627,014.70 and 74,890,816.20 is: 112,336,224.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,418,009.80 : 117,627,014.70 = 74,890,816.20 : x
  2. Step 2: Convert to fraction form
    78,418,009.80/117,627,014.70 = 74,890,816.20/x
  3. Step 3: Cross multiply
    78,418,009.80x = 117,627,014.70 × 74,890,816.20
  4. Step 4: Simplify right side
    78,418,009.80x = 8,809,183,138,052,399
  5. Step 5: Solve for x
    x = 8,809,183,138,052,399/78,418,009.80
  6. Step 6: Final answer
    x = 112,336,224.30

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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.