Home / 71,983.60-99,336.69-39,718.51

Finding the Fourth Proportional to 71,983.60, 99,336.69 and 39,718.51

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Solution

The fourth proportional to 71,983.60, 99,336.69 and 39,718.51 is: 54,811.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,983.60 : 99,336.69 = 39,718.51 : x
  2. Step 2: Convert to fraction form
    71,983.60/99,336.69 = 39,718.51/x
  3. Step 3: Cross multiply
    71,983.60x = 99,336.69 × 39,718.51
  4. Step 4: Simplify right side
    71,983.60x = 3,945,505,315.13
  5. Step 5: Solve for x
    x = 3,945,505,315.13/71,983.60
  6. Step 6: Final answer
    x = 54,811.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.