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Finding the Fourth Proportional to 108,644.64, 162,953.12 and 42,039.20

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Solution

The fourth proportional to 108,644.64, 162,953.12 and 42,039.20 is: 63,053.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,644.64 : 162,953.12 = 42,039.20 : x
  2. Step 2: Convert to fraction form
    108,644.64/162,953.12 = 42,039.20/x
  3. Step 3: Cross multiply
    108,644.64x = 162,953.12 × 42,039.20
  4. Step 4: Simplify right side
    108,644.64x = 6,850,419,078.31
  5. Step 5: Solve for x
    x = 6,850,419,078.31/108,644.64
  6. Step 6: Final answer
    x = 63,053.45

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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.