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Finding the Fourth Proportional to 73,430.40, 110,149.80 and 20,835.78

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Solution

The fourth proportional to 73,430.40, 110,149.80 and 20,835.78 is: 31,254.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,430.40 : 110,149.80 = 20,835.78 : x
  2. Step 2: Convert to fraction form
    73,430.40/110,149.80 = 20,835.78/x
  3. Step 3: Cross multiply
    73,430.40x = 110,149.80 × 20,835.78
  4. Step 4: Simplify right side
    73,430.40x = 2,295,056,999.84
  5. Step 5: Solve for x
    x = 2,295,056,999.84/73,430.40
  6. Step 6: Final answer
    x = 31,254.86

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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.