Home / 78,639,185.62-117,958,676.73-21,131,457.67

Finding the Fourth Proportional to 78,639,185.62, 117,958,676.73 and 21,131,457.67

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Solution

The fourth proportional to 78,639,185.62, 117,958,676.73 and 21,131,457.67 is: 31,697,159.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639,185.62 : 117,958,676.73 = 21,131,457.67 : x
  2. Step 2: Convert to fraction form
    78,639,185.62/117,958,676.73 = 21,131,457.67/x
  3. Step 3: Cross multiply
    78,639,185.62x = 117,958,676.73 × 21,131,457.67
  4. Step 4: Simplify right side
    78,639,185.62x = 2,492,638,784,129,209.50
  5. Step 5: Solve for x
    x = 2,492,638,784,129,209.50/78,639,185.62
  6. Step 6: Final answer
    x = 31,697,159.18

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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.