Home / 120,467.86-180,686.46-31,728.31

Finding the Fourth Proportional to 120,467.86, 180,686.46 and 31,728.31

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Solution

The fourth proportional to 120,467.86, 180,686.46 and 31,728.31 is: 47,588.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,467.86 : 180,686.46 = 31,728.31 : x
  2. Step 2: Convert to fraction form
    120,467.86/180,686.46 = 31,728.31/x
  3. Step 3: Cross multiply
    120,467.86x = 180,686.46 × 31,728.31
  4. Step 4: Simplify right side
    120,467.86x = 5,732,875,682.95
  5. Step 5: Solve for x
    x = 5,732,875,682.95/120,467.86
  6. Step 6: Final answer
    x = 47,588.43

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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.