Home / 208,316.78-312,489.85-103,107.50

Finding the Fourth Proportional to 208,316.78, 312,489.85 and 103,107.50

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Solution

The fourth proportional to 208,316.78, 312,489.85 and 103,107.50 is: 154,668.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,316.78 : 312,489.85 = 103,107.50 : x
  2. Step 2: Convert to fraction form
    208,316.78/312,489.85 = 103,107.50/x
  3. Step 3: Cross multiply
    208,316.78x = 312,489.85 × 103,107.50
  4. Step 4: Simplify right side
    208,316.78x = 32,220,047,208.88
  5. Step 5: Solve for x
    x = 32,220,047,208.88/208,316.78
  6. Step 6: Final answer
    x = 154,668.52

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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.