Home / 80,403.78-120,607.47-30,507.36

Finding the Fourth Proportional to 80,403.78, 120,607.47 and 30,507.36

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Solution

The fourth proportional to 80,403.78, 120,607.47 and 30,507.36 is: 45,761.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,403.78 : 120,607.47 = 30,507.36 : x
  2. Step 2: Convert to fraction form
    80,403.78/120,607.47 = 30,507.36/x
  3. Step 3: Cross multiply
    80,403.78x = 120,607.47 × 30,507.36
  4. Step 4: Simplify right side
    80,403.78x = 3,679,415,505.98
  5. Step 5: Solve for x
    x = 3,679,415,505.98/80,403.78
  6. Step 6: Final answer
    x = 45,761.72

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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.