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Finding the Fourth Proportional to 210,634.48, 315,951.72 and 70,393.11

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Solution

The fourth proportional to 210,634.48, 315,951.72 and 70,393.11 is: 105,589.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,634.48 : 315,951.72 = 70,393.11 : x
  2. Step 2: Convert to fraction form
    210,634.48/315,951.72 = 70,393.11/x
  3. Step 3: Cross multiply
    210,634.48x = 315,951.72 × 70,393.11
  4. Step 4: Simplify right side
    210,634.48x = 22,240,824,180.65
  5. Step 5: Solve for x
    x = 22,240,824,180.65/210,634.48
  6. Step 6: Final answer
    x = 105,589.67

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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.