Home / 120,664.80-181,049.04-85,828.32

Finding the Fourth Proportional to 120,664.80, 181,049.04 and 85,828.32

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Solution

The fourth proportional to 120,664.80, 181,049.04 and 85,828.32 is: 128,779.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,664.80 : 181,049.04 = 85,828.32 : x
  2. Step 2: Convert to fraction form
    120,664.80/181,049.04 = 85,828.32/x
  3. Step 3: Cross multiply
    120,664.80x = 181,049.04 × 85,828.32
  4. Step 4: Simplify right side
    120,664.80x = 15,539,134,940.81
  5. Step 5: Solve for x
    x = 15,539,134,940.81/120,664.80
  6. Step 6: Final answer
    x = 128,779.35

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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.