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Finding the Fourth Proportional to 73,689.54, 110,533.95 and 21,099

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Solution

The fourth proportional to 73,689.54, 110,533.95 and 21,099 is: 31,648.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,689.54 : 110,533.95 = 21,099 : x
  2. Step 2: Convert to fraction form
    73,689.54/110,533.95 = 21,099/x
  3. Step 3: Cross multiply
    73,689.54x = 110,533.95 × 21,099
  4. Step 4: Simplify right side
    73,689.54x = 2,332,155,811.05
  5. Step 5: Solve for x
    x = 2,332,155,811.05/73,689.54
  6. Step 6: Final answer
    x = 31,648.40

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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.