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Finding the Fourth Proportional to 66,341.71, 91,536.74 and 55,629.91

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Solution

The fourth proportional to 66,341.71, 91,536.74 and 55,629.91 is: 76,756.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,341.71 : 91,536.74 = 55,629.91 : x
  2. Step 2: Convert to fraction form
    66,341.71/91,536.74 = 55,629.91/x
  3. Step 3: Cross multiply
    66,341.71x = 91,536.74 × 55,629.91
  4. Step 4: Simplify right side
    66,341.71x = 5,092,180,100.90
  5. Step 5: Solve for x
    x = 5,092,180,100.90/66,341.71
  6. Step 6: Final answer
    x = 76,756.84

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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.