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Finding the Fourth Proportional to 66,170.88, 91,315.64 and 35,956.20

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Solution

The fourth proportional to 66,170.88, 91,315.64 and 35,956.20 is: 49,619.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,170.88 : 91,315.64 = 35,956.20 : x
  2. Step 2: Convert to fraction form
    66,170.88/91,315.64 = 35,956.20/x
  3. Step 3: Cross multiply
    66,170.88x = 91,315.64 × 35,956.20
  4. Step 4: Simplify right side
    66,170.88x = 3,283,363,235.19
  5. Step 5: Solve for x
    x = 3,283,363,235.19/66,170.88
  6. Step 6: Final answer
    x = 49,619.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.