Home / 78,938,856.93-118,399,240.44-20,652,161.85

Finding the Fourth Proportional to 78,938,856.93, 118,399,240.44 and 20,652,161.85

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Solution

The fourth proportional to 78,938,856.93, 118,399,240.44 and 20,652,161.85 is: 30,975,876.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938,856.93 : 118,399,240.44 = 20,652,161.85 : x
  2. Step 2: Convert to fraction form
    78,938,856.93/118,399,240.44 = 20,652,161.85/x
  3. Step 3: Cross multiply
    78,938,856.93x = 118,399,240.44 × 20,652,161.85
  4. Step 4: Simplify right side
    78,938,856.93x = 2,445,200,276,483,945.50
  5. Step 5: Solve for x
    x = 2,445,200,276,483,945.50/78,938,856.93
  6. Step 6: Final answer
    x = 30,975,876.41

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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.