Home / 87,991.10-121,395.90-57,792.80

Finding the Fourth Proportional to 87,991.10, 121,395.90 and 57,792.80

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Solution

The fourth proportional to 87,991.10, 121,395.90 and 57,792.80 is: 79,733.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,991.10 : 121,395.90 = 57,792.80 : x
  2. Step 2: Convert to fraction form
    87,991.10/121,395.90 = 57,792.80/x
  3. Step 3: Cross multiply
    87,991.10x = 121,395.90 × 57,792.80
  4. Step 4: Simplify right side
    87,991.10x = 7,015,808,969.52
  5. Step 5: Solve for x
    x = 7,015,808,969.52/87,991.10
  6. Step 6: Final answer
    x = 79,733.17

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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.