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Finding the Fourth Proportional to 117,879.86, 162,677.76 and 72,583.98

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Solution

The fourth proportional to 117,879.86, 162,677.76 and 72,583.98 is: 100,168.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,879.86 : 162,677.76 = 72,583.98 : x
  2. Step 2: Convert to fraction form
    117,879.86/162,677.76 = 72,583.98/x
  3. Step 3: Cross multiply
    117,879.86x = 162,677.76 × 72,583.98
  4. Step 4: Simplify right side
    117,879.86x = 11,807,799,278.28
  5. Step 5: Solve for x
    x = 11,807,799,278.28/117,879.86
  6. Step 6: Final answer
    x = 100,168.08

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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.