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Finding the Fourth Proportional to 64,890, 89,467.08 and 54,150.30

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Solution

The fourth proportional to 64,890, 89,467.08 and 54,150.30 is: 74,659.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,890 : 89,467.08 = 54,150.30 : x
  2. Step 2: Convert to fraction form
    64,890/89,467.08 = 54,150.30/x
  3. Step 3: Cross multiply
    64,890x = 89,467.08 × 54,150.30
  4. Step 4: Simplify right side
    64,890x = 4,844,669,222.12
  5. Step 5: Solve for x
    x = 4,844,669,222.12/64,890
  6. Step 6: Final answer
    x = 74,659.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.