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Finding the Fourth Proportional to 66,039.57, 91,110.69 and 43,390.76

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Solution

The fourth proportional to 66,039.57, 91,110.69 and 43,390.76 is: 59,863.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,039.57 : 91,110.69 = 43,390.76 : x
  2. Step 2: Convert to fraction form
    66,039.57/91,110.69 = 43,390.76/x
  3. Step 3: Cross multiply
    66,039.57x = 91,110.69 × 43,390.76
  4. Step 4: Simplify right side
    66,039.57x = 3,953,361,627.67
  5. Step 5: Solve for x
    x = 3,953,361,627.67/66,039.57
  6. Step 6: Final answer
    x = 59,863.53

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1.5x scale

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.