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Finding the Fourth Proportional to 210,628.64, 315,942.96 and 70,387.27

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Solution

The fourth proportional to 210,628.64, 315,942.96 and 70,387.27 is: 105,580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,628.64 : 315,942.96 = 70,387.27 : x
  2. Step 2: Convert to fraction form
    210,628.64/315,942.96 = 70,387.27/x
  3. Step 3: Cross multiply
    210,628.64x = 315,942.96 × 70,387.27
  4. Step 4: Simplify right side
    210,628.64x = 22,238,361,179.84
  5. Step 5: Solve for x
    x = 22,238,361,179.84/210,628.64
  6. Step 6: Final answer
    x = 105,580.90

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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.