Home / 102,682.28-153,864.66-80,139.52

Finding the Fourth Proportional to 102,682.28, 153,864.66 and 80,139.52

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Solution

The fourth proportional to 102,682.28, 153,864.66 and 80,139.52 is: 120,085.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,682.28 : 153,864.66 = 80,139.52 : x
  2. Step 2: Convert to fraction form
    102,682.28/153,864.66 = 80,139.52/x
  3. Step 3: Cross multiply
    102,682.28x = 153,864.66 × 80,139.52
  4. Step 4: Simplify right side
    102,682.28x = 12,330,639,997.36
  5. Step 5: Solve for x
    x = 12,330,639,997.36/102,682.28
  6. Step 6: Final answer
    x = 120,085.37

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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.