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Finding the Fourth Proportional to 80,820.80, 111,542.90 and 48,985.64

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Solution

The fourth proportional to 80,820.80, 111,542.90 and 48,985.64 is: 67,606.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,820.80 : 111,542.90 = 48,985.64 : x
  2. Step 2: Convert to fraction form
    80,820.80/111,542.90 = 48,985.64/x
  3. Step 3: Cross multiply
    80,820.80x = 111,542.90 × 48,985.64
  4. Step 4: Simplify right side
    80,820.80x = 5,464,000,343.96
  5. Step 5: Solve for x
    x = 5,464,000,343.96/80,820.80
  6. Step 6: Final answer
    x = 67,606.36

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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.