Home / 78,639,184.62-117,958,675.23-21,131,456.67

Finding the Fourth Proportional to 78,639,184.62, 117,958,675.23 and 21,131,456.67

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Solution

The fourth proportional to 78,639,184.62, 117,958,675.23 and 21,131,456.67 is: 31,697,157.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639,184.62 : 117,958,675.23 = 21,131,456.67 : x
  2. Step 2: Convert to fraction form
    78,639,184.62/117,958,675.23 = 21,131,456.67/x
  3. Step 3: Cross multiply
    78,639,184.62x = 117,958,675.23 × 21,131,456.67
  4. Step 4: Simplify right side
    78,639,184.62x = 2,492,638,634,473,347.50
  5. Step 5: Solve for x
    x = 2,492,638,634,473,347.50/78,639,184.62
  6. Step 6: Final answer
    x = 31,697,157.68

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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.