Home / 210,631.83-315,977.33-68,431.47

Finding the Fourth Proportional to 210,631.83, 315,977.33 and 68,431.47

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Solution

The fourth proportional to 210,631.83, 315,977.33 and 68,431.47 is: 102,656.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,631.83 : 315,977.33 = 68,431.47 : x
  2. Step 2: Convert to fraction form
    210,631.83/315,977.33 = 68,431.47/x
  3. Step 3: Cross multiply
    210,631.83x = 315,977.33 × 68,431.47
  4. Step 4: Simplify right side
    210,631.83x = 21,622,793,178.58
  5. Step 5: Solve for x
    x = 21,622,793,178.58/210,631.83
  6. Step 6: Final answer
    x = 102,656.82

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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.