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Finding the Fourth Proportional to 65,415,067.80, 98,122,601.70 and 39,842,914.20

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Solution

The fourth proportional to 65,415,067.80, 98,122,601.70 and 39,842,914.20 is: 59,764,371.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,415,067.80 : 98,122,601.70 = 39,842,914.20 : x
  2. Step 2: Convert to fraction form
    65,415,067.80/98,122,601.70 = 39,842,914.20/x
  3. Step 3: Cross multiply
    65,415,067.80x = 98,122,601.70 × 39,842,914.20
  4. Step 4: Simplify right side
    65,415,067.80x = 3,909,490,400,613,874.50
  5. Step 5: Solve for x
    x = 3,909,490,400,613,874.50/65,415,067.80
  6. Step 6: Final answer
    x = 59,764,371.30

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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.