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Finding the Fourth Proportional to 210,701.53, 315,243.63 and 120,787.36

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Solution

The fourth proportional to 210,701.53, 315,243.63 and 120,787.36 is: 180,717.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,701.53 : 315,243.63 = 120,787.36 : x
  2. Step 2: Convert to fraction form
    210,701.53/315,243.63 = 120,787.36/x
  3. Step 3: Cross multiply
    210,701.53x = 315,243.63 × 120,787.36
  4. Step 4: Simplify right side
    210,701.53x = 38,077,445,824.52
  5. Step 5: Solve for x
    x = 38,077,445,824.52/210,701.53
  6. Step 6: Final answer
    x = 180,717.46

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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.