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Finding the Fourth Proportional to 74,615.60, 111,927.78 and 21,303.48

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Solution

The fourth proportional to 74,615.60, 111,927.78 and 21,303.48 is: 31,956.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,615.60 : 111,927.78 = 21,303.48 : x
  2. Step 2: Convert to fraction form
    74,615.60/111,927.78 = 21,303.48/x
  3. Step 3: Cross multiply
    74,615.60x = 111,927.78 × 21,303.48
  4. Step 4: Simplify right side
    74,615.60x = 2,384,451,222.67
  5. Step 5: Solve for x
    x = 2,384,451,222.67/74,615.60
  6. Step 6: Final answer
    x = 31,956.47

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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.