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Finding the Fourth Proportional to 40,720.80, 61,064.80 and 17,012.81

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Solution

The fourth proportional to 40,720.80, 61,064.80 and 17,012.81 is: 25,512.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,720.80 : 61,064.80 = 17,012.81 : x
  2. Step 2: Convert to fraction form
    40,720.80/61,064.80 = 17,012.81/x
  3. Step 3: Cross multiply
    40,720.80x = 61,064.80 × 17,012.81
  4. Step 4: Simplify right side
    40,720.80x = 1,038,883,950.22
  5. Step 5: Solve for x
    x = 1,038,883,950.22/40,720.80
  6. Step 6: Final answer
    x = 25,512.37

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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.