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Finding the Fourth Proportional to 66,124.55, 91,265.12 and 39,281.96

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Solution

The fourth proportional to 66,124.55, 91,265.12 and 39,281.96 is: 54,216.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,124.55 : 91,265.12 = 39,281.96 : x
  2. Step 2: Convert to fraction form
    66,124.55/91,265.12 = 39,281.96/x
  3. Step 3: Cross multiply
    66,124.55x = 91,265.12 × 39,281.96
  4. Step 4: Simplify right side
    66,124.55x = 3,585,072,140.50
  5. Step 5: Solve for x
    x = 3,585,072,140.50/66,124.55
  6. Step 6: Final answer
    x = 54,216.96

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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.