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Finding the Fourth Proportional to 125,985,646.40, 188,978,469.60 and 107,845,793.60

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Solution

The fourth proportional to 125,985,646.40, 188,978,469.60 and 107,845,793.60 is: 161,768,690.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,985,646.40 : 188,978,469.60 = 107,845,793.60 : x
  2. Step 2: Convert to fraction form
    125,985,646.40/188,978,469.60 = 107,845,793.60/x
  3. Step 3: Cross multiply
    125,985,646.40x = 188,978,469.60 × 107,845,793.60
  4. Step 4: Simplify right side
    125,985,646.40x = 20,380,533,027,325,472
  5. Step 5: Solve for x
    x = 20,380,533,027,325,472/125,985,646.40
  6. Step 6: Final answer
    x = 161,768,690.40

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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.