Home / 217,429,912.56-300,112,121.88-128,199,690.48

Finding the Fourth Proportional to 217,429,912.56, 300,112,121.88 and 128,199,690.48

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Solution

The fourth proportional to 217,429,912.56, 300,112,121.88 and 128,199,690.48 is: 176,950,267.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,429,912.56 : 300,112,121.88 = 128,199,690.48 : x
  2. Step 2: Convert to fraction form
    217,429,912.56/300,112,121.88 = 128,199,690.48/x
  3. Step 3: Cross multiply
    217,429,912.56x = 300,112,121.88 × 128,199,690.48
  4. Step 4: Simplify right side
    217,429,912.56x = 38,474,281,134,312,040
  5. Step 5: Solve for x
    x = 38,474,281,134,312,040/217,429,912.56
  6. Step 6: Final answer
    x = 176,950,267.24

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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.