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Finding the Fourth Proportional to 72,987.99, 109,487.75 and 23,071.89

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Solution

The fourth proportional to 72,987.99, 109,487.75 and 23,071.89 is: 34,609.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,987.99 : 109,487.75 = 23,071.89 : x
  2. Step 2: Convert to fraction form
    72,987.99/109,487.75 = 23,071.89/x
  3. Step 3: Cross multiply
    72,987.99x = 109,487.75 × 23,071.89
  4. Step 4: Simplify right side
    72,987.99x = 2,526,089,324.35
  5. Step 5: Solve for x
    x = 2,526,089,324.35/72,987.99
  6. Step 6: Final answer
    x = 34,609.66

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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.