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Finding the Fourth Proportional to 77,999.96, 116,999.64 and 18,835.54

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Solution

The fourth proportional to 77,999.96, 116,999.64 and 18,835.54 is: 28,253.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,999.96 : 116,999.64 = 18,835.54 : x
  2. Step 2: Convert to fraction form
    77,999.96/116,999.64 = 18,835.54/x
  3. Step 3: Cross multiply
    77,999.96x = 116,999.64 × 18,835.54
  4. Step 4: Simplify right side
    77,999.96x = 2,203,751,106.71
  5. Step 5: Solve for x
    x = 2,203,751,106.71/77,999.96
  6. Step 6: Final answer
    x = 28,253.23

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1.5x scale

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.