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Finding the Fourth Proportional to 77,636.88, 107,150.40 and 47,439.60

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Solution

The fourth proportional to 77,636.88, 107,150.40 and 47,439.60 is: 65,473.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,636.88 : 107,150.40 = 47,439.60 : x
  2. Step 2: Convert to fraction form
    77,636.88/107,150.40 = 47,439.60/x
  3. Step 3: Cross multiply
    77,636.88x = 107,150.40 × 47,439.60
  4. Step 4: Simplify right side
    77,636.88x = 5,083,172,115.84
  5. Step 5: Solve for x
    x = 5,083,172,115.84/77,636.88
  6. Step 6: Final answer
    x = 65,473.68

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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.