Home / 81,022.16-121,358.28-79,039.28

Finding the Fourth Proportional to 81,022.16, 121,358.28 and 79,039.28

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Solution

The fourth proportional to 81,022.16, 121,358.28 and 79,039.28 is: 118,388.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,022.16 : 121,358.28 = 79,039.28 : x
  2. Step 2: Convert to fraction form
    81,022.16/121,358.28 = 79,039.28/x
  3. Step 3: Cross multiply
    81,022.16x = 121,358.28 × 79,039.28
  4. Step 4: Simplify right side
    81,022.16x = 9,592,071,073.24
  5. Step 5: Solve for x
    x = 9,592,071,073.24/81,022.16
  6. Step 6: Final answer
    x = 118,388.24

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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.