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Finding the Fourth Proportional to 123,647.64, 185,469.40 and 39,406.64

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Solution

The fourth proportional to 123,647.64, 185,469.40 and 39,406.64 is: 59,109.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,647.64 : 185,469.40 = 39,406.64 : x
  2. Step 2: Convert to fraction form
    123,647.64/185,469.40 = 39,406.64/x
  3. Step 3: Cross multiply
    123,647.64x = 185,469.40 × 39,406.64
  4. Step 4: Simplify right side
    123,647.64x = 7,308,725,876.82
  5. Step 5: Solve for x
    x = 7,308,725,876.82/123,647.64
  6. Step 6: Final answer
    x = 59,109.30

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1.5x scale

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.