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Finding the Fourth Proportional to 207,269.40, 310,904.10 and 67,128.60

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Solution

The fourth proportional to 207,269.40, 310,904.10 and 67,128.60 is: 100,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,269.40 : 310,904.10 = 67,128.60 : x
  2. Step 2: Convert to fraction form
    207,269.40/310,904.10 = 67,128.60/x
  3. Step 3: Cross multiply
    207,269.40x = 310,904.10 × 67,128.60
  4. Step 4: Simplify right side
    207,269.40x = 20,870,556,967.26
  5. Step 5: Solve for x
    x = 20,870,556,967.26/207,269.40
  6. Step 6: Final answer
    x = 100,692.90

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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.