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Finding the Fourth Proportional to 210,479.76, 315,617.31 and 70,191

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Solution

The fourth proportional to 210,479.76, 315,617.31 and 70,191 is: 105,252.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,479.76 : 315,617.31 = 70,191 : x
  2. Step 2: Convert to fraction form
    210,479.76/315,617.31 = 70,191/x
  3. Step 3: Cross multiply
    210,479.76x = 315,617.31 × 70,191
  4. Step 4: Simplify right side
    210,479.76x = 22,153,494,606.21
  5. Step 5: Solve for x
    x = 22,153,494,606.21/210,479.76
  6. Step 6: Final answer
    x = 105,252.37

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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.