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Finding the Fourth Proportional to 210,212, 315,371.36 and 60,449.07

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Solution

The fourth proportional to 210,212, 315,371.36 and 60,449.07 is: 90,688.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,212 : 315,371.36 = 60,449.07 : x
  2. Step 2: Convert to fraction form
    210,212/315,371.36 = 60,449.07/x
  3. Step 3: Cross multiply
    210,212x = 315,371.36 × 60,449.07
  4. Step 4: Simplify right side
    210,212x = 19,063,905,416.64
  5. Step 5: Solve for x
    x = 19,063,905,416.64/210,212
  6. Step 6: Final answer
    x = 90,688.95

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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.