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Finding the Fourth Proportional to 66,987.92, 100,430.04 and 30,026

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Solution

The fourth proportional to 66,987.92, 100,430.04 and 30,026 is: 45,015.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,987.92 : 100,430.04 = 30,026 : x
  2. Step 2: Convert to fraction form
    66,987.92/100,430.04 = 30,026/x
  3. Step 3: Cross multiply
    66,987.92x = 100,430.04 × 30,026
  4. Step 4: Simplify right side
    66,987.92x = 3,015,512,381.04
  5. Step 5: Solve for x
    x = 3,015,512,381.04/66,987.92
  6. Step 6: Final answer
    x = 45,015.76

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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.