Home / 420,365,764.80-630,608,911.20-129,257,337.60

Finding the Fourth Proportional to 420,365,764.80, 630,608,911.20 and 129,257,337.60

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Solution

The fourth proportional to 420,365,764.80, 630,608,911.20 and 129,257,337.60 is: 193,904,536.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,365,764.80 : 630,608,911.20 = 129,257,337.60 : x
  2. Step 2: Convert to fraction form
    420,365,764.80/630,608,911.20 = 129,257,337.60/x
  3. Step 3: Cross multiply
    420,365,764.80x = 630,608,911.20 × 129,257,337.60
  4. Step 4: Simplify right side
    420,365,764.80x = 81,510,828,928,546,816
  5. Step 5: Solve for x
    x = 81,510,828,928,546,816/420,365,764.80
  6. Step 6: Final answer
    x = 193,904,536.84

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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.