Home / 86,782,584.55-129,407,142.87-86,003,662.63

Finding the Fourth Proportional to 86,782,584.55, 129,407,142.87 and 86,003,662.63

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Solution

The fourth proportional to 86,782,584.55, 129,407,142.87 and 86,003,662.63 is: 128,245,641.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,782,584.55 : 129,407,142.87 = 86,003,662.63 : x
  2. Step 2: Convert to fraction form
    86,782,584.55/129,407,142.87 = 86,003,662.63/x
  3. Step 3: Cross multiply
    86,782,584.55x = 129,407,142.87 × 86,003,662.63
  4. Step 4: Simplify right side
    86,782,584.55x = 11,129,488,257,303,690
  5. Step 5: Solve for x
    x = 11,129,488,257,303,690/86,782,584.55
  6. Step 6: Final answer
    x = 128,245,641.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.