Home / 120,021.29-180,080.34-53,415.86

Finding the Fourth Proportional to 120,021.29, 180,080.34 and 53,415.86

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Solution

The fourth proportional to 120,021.29, 180,080.34 and 53,415.86 is: 80,145.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,021.29 : 180,080.34 = 53,415.86 : x
  2. Step 2: Convert to fraction form
    120,021.29/180,080.34 = 53,415.86/x
  3. Step 3: Cross multiply
    120,021.29x = 180,080.34 × 53,415.86
  4. Step 4: Simplify right side
    120,021.29x = 9,619,146,392.82
  5. Step 5: Solve for x
    x = 9,619,146,392.82/120,021.29
  6. Step 6: Final answer
    x = 80,145.34

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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.