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Finding the Fourth Proportional to 72,919.19, 109,378.82 and 17,515.19

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Solution

The fourth proportional to 72,919.19, 109,378.82 and 17,515.19 is: 26,272.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,919.19 : 109,378.82 = 17,515.19 : x
  2. Step 2: Convert to fraction form
    72,919.19/109,378.82 = 17,515.19/x
  3. Step 3: Cross multiply
    72,919.19x = 109,378.82 × 17,515.19
  4. Step 4: Simplify right side
    72,919.19x = 1,915,791,131.51
  5. Step 5: Solve for x
    x = 1,915,791,131.51/72,919.19
  6. Step 6: Final answer
    x = 26,272.80

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1.5x scale

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.