Home / 128,945.64-193,418.16-72,760.24

Finding the Fourth Proportional to 128,945.64, 193,418.16 and 72,760.24

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Solution

The fourth proportional to 128,945.64, 193,418.16 and 72,760.24 is: 109,140.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,945.64 : 193,418.16 = 72,760.24 : x
  2. Step 2: Convert to fraction form
    128,945.64/193,418.16 = 72,760.24/x
  3. Step 3: Cross multiply
    128,945.64x = 193,418.16 × 72,760.24
  4. Step 4: Simplify right side
    128,945.64x = 14,073,151,741.96
  5. Step 5: Solve for x
    x = 14,073,151,741.96/128,945.64
  6. Step 6: Final answer
    x = 109,140.19

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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.