Home / 208,008,215.40-312,012,323.10-100,512,791.40

Finding the Fourth Proportional to 208,008,215.40, 312,012,323.10 and 100,512,791.40

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Solution

The fourth proportional to 208,008,215.40, 312,012,323.10 and 100,512,791.40 is: 150,769,187.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,008,215.40 : 312,012,323.10 = 100,512,791.40 : x
  2. Step 2: Convert to fraction form
    208,008,215.40/312,012,323.10 = 100,512,791.40/x
  3. Step 3: Cross multiply
    208,008,215.40x = 312,012,323.10 × 100,512,791.40
  4. Step 4: Simplify right side
    208,008,215.40x = 31,361,229,545,979,704
  5. Step 5: Solve for x
    x = 31,361,229,545,979,704/208,008,215.40
  6. Step 6: Final answer
    x = 150,769,187.10

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1.5x scale

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.