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Finding the Fourth Proportional to 137,751.86, 190,116.77 and 76,511.81

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Solution

The fourth proportional to 137,751.86, 190,116.77 and 76,511.81 is: 105,596.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,751.86 : 190,116.77 = 76,511.81 : x
  2. Step 2: Convert to fraction form
    137,751.86/190,116.77 = 76,511.81/x
  3. Step 3: Cross multiply
    137,751.86x = 190,116.77 × 76,511.81
  4. Step 4: Simplify right side
    137,751.86x = 14,546,178,276.79
  5. Step 5: Solve for x
    x = 14,546,178,276.79/137,751.86
  6. Step 6: Final answer
    x = 105,596.96

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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.