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Finding the Fourth Proportional to 72,656.60, 109,071.30 and 41,091.80

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Solution

The fourth proportional to 72,656.60, 109,071.30 and 41,091.80 is: 61,686.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,656.60 : 109,071.30 = 41,091.80 : x
  2. Step 2: Convert to fraction form
    72,656.60/109,071.30 = 41,091.80/x
  3. Step 3: Cross multiply
    72,656.60x = 109,071.30 × 41,091.80
  4. Step 4: Simplify right side
    72,656.60x = 4,481,936,045.34
  5. Step 5: Solve for x
    x = 4,481,936,045.34/72,656.60
  6. Step 6: Final answer
    x = 61,686.56

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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.