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Finding the Fourth Proportional to 210,615.52, 315,939.60 and 70,374.64

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Solution

The fourth proportional to 210,615.52, 315,939.60 and 70,374.64 is: 105,567.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,615.52 : 315,939.60 = 70,374.64 : x
  2. Step 2: Convert to fraction form
    210,615.52/315,939.60 = 70,374.64/x
  3. Step 3: Cross multiply
    210,615.52x = 315,939.60 × 70,374.64
  4. Step 4: Simplify right side
    210,615.52x = 22,234,135,611.74
  5. Step 5: Solve for x
    x = 22,234,135,611.74/210,615.52
  6. Step 6: Final answer
    x = 105,567.41

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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.