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Finding the Fourth Proportional to 71,656.80, 107,485.20 and 55,100.40

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Solution

The fourth proportional to 71,656.80, 107,485.20 and 55,100.40 is: 82,650.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,656.80 : 107,485.20 = 55,100.40 : x
  2. Step 2: Convert to fraction form
    71,656.80/107,485.20 = 55,100.40/x
  3. Step 3: Cross multiply
    71,656.80x = 107,485.20 × 55,100.40
  4. Step 4: Simplify right side
    71,656.80x = 5,922,477,514.08
  5. Step 5: Solve for x
    x = 5,922,477,514.08/71,656.80
  6. Step 6: Final answer
    x = 82,650.60

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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.