Home / 78,492,536.60-117,729,836.17-20,989,292.00

Finding the Fourth Proportional to 78,492,536.60, 117,729,836.17 and 20,989,292.00

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Solution

The fourth proportional to 78,492,536.60, 117,729,836.17 and 20,989,292.00 is: 31,481,539.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,492,536.60 : 117,729,836.17 = 20,989,292.00 : x
  2. Step 2: Convert to fraction form
    78,492,536.60/117,729,836.17 = 20,989,292.00/x
  3. Step 3: Cross multiply
    78,492,536.60x = 117,729,836.17 × 20,989,292.00
  4. Step 4: Simplify right side
    78,492,536.60x = 2,471,065,907,843,169.50
  5. Step 5: Solve for x
    x = 2,471,065,907,843,169.50/78,492,536.60
  6. Step 6: Final answer
    x = 31,481,539.71

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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.