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Finding the Fourth Proportional to 210,403.86, 315,626.85 and 60,647.82

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Solution

The fourth proportional to 210,403.86, 315,626.85 and 60,647.82 is: 90,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,403.86 : 315,626.85 = 60,647.82 : x
  2. Step 2: Convert to fraction form
    210,403.86/315,626.85 = 60,647.82/x
  3. Step 3: Cross multiply
    210,403.86x = 315,626.85 × 60,647.82
  4. Step 4: Simplify right side
    210,403.86x = 19,142,080,385.97
  5. Step 5: Solve for x
    x = 19,142,080,385.97/210,403.86
  6. Step 6: Final answer
    x = 90,977.80

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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.