Home / 78,639,169.40-117,958,652.58-21,131,441.24

Finding the Fourth Proportional to 78,639,169.40, 117,958,652.58 and 21,131,441.24

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Solution

The fourth proportional to 78,639,169.40, 117,958,652.58 and 21,131,441.24 is: 31,697,134.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639,169.40 : 117,958,652.58 = 21,131,441.24 : x
  2. Step 2: Convert to fraction form
    78,639,169.40/117,958,652.58 = 21,131,441.24/x
  3. Step 3: Cross multiply
    78,639,169.40x = 117,958,652.58 × 21,131,441.24
  4. Step 4: Simplify right side
    78,639,169.40x = 2,492,636,335,743,844
  5. Step 5: Solve for x
    x = 2,492,636,335,743,844/78,639,169.40
  6. Step 6: Final answer
    x = 31,697,134.58

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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.