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Finding the Fourth Proportional to 66,091.55, 91,225.54 and 40,259.43

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Solution

The fourth proportional to 66,091.55, 91,225.54 and 40,259.43 is: 55,569.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,091.55 : 91,225.54 = 40,259.43 : x
  2. Step 2: Convert to fraction form
    66,091.55/91,225.54 = 40,259.43/x
  3. Step 3: Cross multiply
    66,091.55x = 91,225.54 × 40,259.43
  4. Step 4: Simplify right side
    66,091.55x = 3,672,688,292.17
  5. Step 5: Solve for x
    x = 3,672,688,292.17/66,091.55
  6. Step 6: Final answer
    x = 55,569.71

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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.