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Finding the Fourth Proportional to 73,750.95, 110,630.54 and 21,159

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Solution

The fourth proportional to 73,750.95, 110,630.54 and 21,159 is: 31,739.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,750.95 : 110,630.54 = 21,159 : x
  2. Step 2: Convert to fraction form
    73,750.95/110,630.54 = 21,159/x
  3. Step 3: Cross multiply
    73,750.95x = 110,630.54 × 21,159
  4. Step 4: Simplify right side
    73,750.95x = 2,340,831,648.76
  5. Step 5: Solve for x
    x = 2,340,831,648.76/73,750.95
  6. Step 6: Final answer
    x = 31,739.68

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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.