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Finding the Fourth Proportional to 72,331.80, 107,955.44 and 67,607.88

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Solution

The fourth proportional to 72,331.80, 107,955.44 and 67,607.88 is: 100,904.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,331.80 : 107,955.44 = 67,607.88 : x
  2. Step 2: Convert to fraction form
    72,331.80/107,955.44 = 67,607.88/x
  3. Step 3: Cross multiply
    72,331.80x = 107,955.44 × 67,607.88
  4. Step 4: Simplify right side
    72,331.80x = 7,298,638,094.83
  5. Step 5: Solve for x
    x = 7,298,638,094.83/72,331.80
  6. Step 6: Final answer
    x = 100,904.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.