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Finding the Fourth Proportional to 210,147.60, 315,250.20 and 69,891.60

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Solution

The fourth proportional to 210,147.60, 315,250.20 and 69,891.60 is: 104,846.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,147.60 : 315,250.20 = 69,891.60 : x
  2. Step 2: Convert to fraction form
    210,147.60/315,250.20 = 69,891.60/x
  3. Step 3: Cross multiply
    210,147.60x = 315,250.20 × 69,891.60
  4. Step 4: Simplify right side
    210,147.60x = 22,033,340,878.32
  5. Step 5: Solve for x
    x = 22,033,340,878.32/210,147.60
  6. Step 6: Final answer
    x = 104,846.98

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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.