Home / 78,166,454.32-117,250,679.31-20,658,228.64

Finding the Fourth Proportional to 78,166,454.32, 117,250,679.31 and 20,658,228.64

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Solution

The fourth proportional to 78,166,454.32, 117,250,679.31 and 20,658,228.64 is: 30,987,606.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,166,454.32 : 117,250,679.31 = 20,658,228.64 : x
  2. Step 2: Convert to fraction form
    78,166,454.32/117,250,679.31 = 20,658,228.64/x
  3. Step 3: Cross multiply
    78,166,454.32x = 117,250,679.31 × 20,658,228.64
  4. Step 4: Simplify right side
    78,166,454.32x = 2,422,191,341,381,297.50
  5. Step 5: Solve for x
    x = 2,422,191,341,381,297.50/78,166,454.32
  6. Step 6: Final answer
    x = 30,987,606.67

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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.