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Finding the Fourth Proportional to 210,355.54, 290,328.06 and 124,310.86

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Solution

The fourth proportional to 210,355.54, 290,328.06 and 124,310.86 is: 171,571.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,355.54 : 290,328.06 = 124,310.86 : x
  2. Step 2: Convert to fraction form
    210,355.54/290,328.06 = 124,310.86/x
  3. Step 3: Cross multiply
    210,355.54x = 290,328.06 × 124,310.86
  4. Step 4: Simplify right side
    210,355.54x = 36,090,930,820.73
  5. Step 5: Solve for x
    x = 36,090,930,820.73/210,355.54
  6. Step 6: Final answer
    x = 171,571.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.