Home / 208,214,940.80-287,336,645.52-115,401,440.72

Finding the Fourth Proportional to 208,214,940.80, 287,336,645.52 and 115,401,440.72

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Solution

The fourth proportional to 208,214,940.80, 287,336,645.52 and 115,401,440.72 is: 159,254,003.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,214,940.80 : 287,336,645.52 = 115,401,440.72 : x
  2. Step 2: Convert to fraction form
    208,214,940.80/287,336,645.52 = 115,401,440.72/x
  3. Step 3: Cross multiply
    208,214,940.80x = 287,336,645.52 × 115,401,440.72
  4. Step 4: Simplify right side
    208,214,940.80x = 33,159,062,864,659,932
  5. Step 5: Solve for x
    x = 33,159,062,864,659,932/208,214,940.80
  6. Step 6: Final answer
    x = 159,254,003.28

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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.