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Finding the Fourth Proportional to 210,386.54, 315,736.55 and 154,371.39

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Solution

The fourth proportional to 210,386.54, 315,736.55 and 154,371.39 is: 231,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,386.54 : 315,736.55 = 154,371.39 : x
  2. Step 2: Convert to fraction form
    210,386.54/315,736.55 = 154,371.39/x
  3. Step 3: Cross multiply
    210,386.54x = 315,736.55 × 154,371.39
  4. Step 4: Simplify right side
    210,386.54x = 48,740,689,325.45
  5. Step 5: Solve for x
    x = 48,740,689,325.45/210,386.54
  6. Step 6: Final answer
    x = 231,672.10

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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.