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Finding the Fourth Proportional to 257,325,533.55, 355,111,978.64 and 139,850,869.86

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Solution

The fourth proportional to 257,325,533.55, 355,111,978.64 and 139,850,869.86 is: 192,995,690.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,325,533.55 : 355,111,978.64 = 139,850,869.86 : x
  2. Step 2: Convert to fraction form
    257,325,533.55/355,111,978.64 = 139,850,869.86/x
  3. Step 3: Cross multiply
    257,325,533.55x = 355,111,978.64 × 139,850,869.86
  4. Step 4: Simplify right side
    257,325,533.55x = 49,662,719,109,810,488
  5. Step 5: Solve for x
    x = 49,662,719,109,810,488/257,325,533.55
  6. Step 6: Final answer
    x = 192,995,690.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.