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Finding the Fourth Proportional to 71,247.64, 98,317.86 and 39,411.40

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Solution

The fourth proportional to 71,247.64, 98,317.86 and 39,411.40 is: 54,385.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,247.64 : 98,317.86 = 39,411.40 : x
  2. Step 2: Convert to fraction form
    71,247.64/98,317.86 = 39,411.40/x
  3. Step 3: Cross multiply
    71,247.64x = 98,317.86 × 39,411.40
  4. Step 4: Simplify right side
    71,247.64x = 3,874,844,507.60
  5. Step 5: Solve for x
    x = 3,874,844,507.60/71,247.64
  6. Step 6: Final answer
    x = 54,385.58

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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.