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Finding the Fourth Proportional to 208,316.57, 312,489.57 and 103,107.29

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Solution

The fourth proportional to 208,316.57, 312,489.57 and 103,107.29 is: 154,668.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,316.57 : 312,489.57 = 103,107.29 : x
  2. Step 2: Convert to fraction form
    208,316.57/312,489.57 = 103,107.29/x
  3. Step 3: Cross multiply
    208,316.57x = 312,489.57 × 103,107.29
  4. Step 4: Simplify right side
    208,316.57x = 32,219,952,715.97
  5. Step 5: Solve for x
    x = 32,219,952,715.97/208,316.57
  6. Step 6: Final answer
    x = 154,668.22

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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.