Home / 78,166,454.45-117,250,679.50-20,658,228.75

Finding the Fourth Proportional to 78,166,454.45, 117,250,679.50 and 20,658,228.75

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Solution

The fourth proportional to 78,166,454.45, 117,250,679.50 and 20,658,228.75 is: 30,987,606.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,166,454.45 : 117,250,679.50 = 20,658,228.75 : x
  2. Step 2: Convert to fraction form
    78,166,454.45/117,250,679.50 = 20,658,228.75/x
  3. Step 3: Cross multiply
    78,166,454.45x = 117,250,679.50 × 20,658,228.75
  4. Step 4: Simplify right side
    78,166,454.45x = 2,422,191,358,152,290
  5. Step 5: Solve for x
    x = 2,422,191,358,152,290/78,166,454.45
  6. Step 6: Final answer
    x = 30,987,606.84

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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.