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Finding the Fourth Proportional to 71,791.20, 107,686.80 and 45,525.60

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Solution

The fourth proportional to 71,791.20, 107,686.80 and 45,525.60 is: 68,288.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,791.20 : 107,686.80 = 45,525.60 : x
  2. Step 2: Convert to fraction form
    71,791.20/107,686.80 = 45,525.60/x
  3. Step 3: Cross multiply
    71,791.20x = 107,686.80 × 45,525.60
  4. Step 4: Simplify right side
    71,791.20x = 4,902,506,182.08
  5. Step 5: Solve for x
    x = 4,902,506,182.08/71,791.20
  6. Step 6: Final answer
    x = 68,288.40

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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.