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Finding the Fourth Proportional to 100,841.95, 139,160.73 and 55,518.97

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Solution

The fourth proportional to 100,841.95, 139,160.73 and 55,518.97 is: 76,615.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,841.95 : 139,160.73 = 55,518.97 : x
  2. Step 2: Convert to fraction form
    100,841.95/139,160.73 = 55,518.97/x
  3. Step 3: Cross multiply
    100,841.95x = 139,160.73 × 55,518.97
  4. Step 4: Simplify right side
    100,841.95x = 7,726,060,394.05
  5. Step 5: Solve for x
    x = 7,726,060,394.05/100,841.95
  6. Step 6: Final answer
    x = 76,615.54

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1.5x scale

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.