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Finding the Fourth Proportional to 78,899,441.80, 118,265,181.90 and 30,358,539.40

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Solution

The fourth proportional to 78,899,441.80, 118,265,181.90 and 30,358,539.40 is: 45,505,495.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,899,441.80 : 118,265,181.90 = 30,358,539.40 : x
  2. Step 2: Convert to fraction form
    78,899,441.80/118,265,181.90 = 30,358,539.40/x
  3. Step 3: Cross multiply
    78,899,441.80x = 118,265,181.90 × 30,358,539.40
  4. Step 4: Simplify right side
    78,899,441.80x = 3,590,358,184,359,317
  5. Step 5: Solve for x
    x = 3,590,358,184,359,317/78,899,441.80
  6. Step 6: Final answer
    x = 45,505,495.38

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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.