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Finding the Fourth Proportional to 108,864, 150,220.80 and 61,122.72

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Solution

The fourth proportional to 108,864, 150,220.80 and 61,122.72 is: 84,342.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,864 : 150,220.80 = 61,122.72 : x
  2. Step 2: Convert to fraction form
    108,864/150,220.80 = 61,122.72/x
  3. Step 3: Cross multiply
    108,864x = 150,220.80 × 61,122.72
  4. Step 4: Simplify right side
    108,864x = 9,181,903,896.58
  5. Step 5: Solve for x
    x = 9,181,903,896.58/108,864
  6. Step 6: Final answer
    x = 84,342.89

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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.