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Finding the Fourth Proportional to 71,485.20, 107,130.60 and 47,725.20

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Solution

The fourth proportional to 71,485.20, 107,130.60 and 47,725.20 is: 71,522.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,485.20 : 107,130.60 = 47,725.20 : x
  2. Step 2: Convert to fraction form
    71,485.20/107,130.60 = 47,725.20/x
  3. Step 3: Cross multiply
    71,485.20x = 107,130.60 × 47,725.20
  4. Step 4: Simplify right side
    71,485.20x = 5,112,829,311.12
  5. Step 5: Solve for x
    x = 5,112,829,311.12/71,485.20
  6. Step 6: Final answer
    x = 71,522.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.