Home / 130,409.28-195,712.92-86,021.28

Finding the Fourth Proportional to 130,409.28, 195,712.92 and 86,021.28

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Solution

The fourth proportional to 130,409.28, 195,712.92 and 86,021.28 is: 129,097.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,409.28 : 195,712.92 = 86,021.28 : x
  2. Step 2: Convert to fraction form
    130,409.28/195,712.92 = 86,021.28/x
  3. Step 3: Cross multiply
    130,409.28x = 195,712.92 × 86,021.28
  4. Step 4: Simplify right side
    130,409.28x = 16,835,475,890.94
  5. Step 5: Solve for x
    x = 16,835,475,890.94/130,409.28
  6. Step 6: Final answer
    x = 129,097.22

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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.