Home / 128,964.20-193,446.48-69,827.72

Finding the Fourth Proportional to 128,964.20, 193,446.48 and 69,827.72

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Solution

The fourth proportional to 128,964.20, 193,446.48 and 69,827.72 is: 104,741.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,964.20 : 193,446.48 = 69,827.72 : x
  2. Step 2: Convert to fraction form
    128,964.20/193,446.48 = 69,827.72/x
  3. Step 3: Cross multiply
    128,964.20x = 193,446.48 × 69,827.72
  4. Step 4: Simplify right side
    128,964.20x = 13,507,926,640.43
  5. Step 5: Solve for x
    x = 13,507,926,640.43/128,964.20
  6. Step 6: Final answer
    x = 104,741.68

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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.