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Finding the Fourth Proportional to 210,521.71, 315,803.82 and 68,361.04

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Solution

The fourth proportional to 210,521.71, 315,803.82 and 68,361.04 is: 102,548.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,521.71 : 315,803.82 = 68,361.04 : x
  2. Step 2: Convert to fraction form
    210,521.71/315,803.82 = 68,361.04/x
  3. Step 3: Cross multiply
    210,521.71x = 315,803.82 × 68,361.04
  4. Step 4: Simplify right side
    210,521.71x = 21,588,677,571.17
  5. Step 5: Solve for x
    x = 21,588,677,571.17/210,521.71
  6. Step 6: Final answer
    x = 102,548.46

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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.