Home / 87,969.65-121,398.56-84,791.21

Finding the Fourth Proportional to 87,969.65, 121,398.56 and 84,791.21

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Solution

The fourth proportional to 87,969.65, 121,398.56 and 84,791.21 is: 117,012.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,969.65 : 121,398.56 = 84,791.21 : x
  2. Step 2: Convert to fraction form
    87,969.65/121,398.56 = 84,791.21/x
  3. Step 3: Cross multiply
    87,969.65x = 121,398.56 × 84,791.21
  4. Step 4: Simplify right side
    87,969.65x = 10,293,529,763.71
  5. Step 5: Solve for x
    x = 10,293,529,763.71/87,969.65
  6. Step 6: Final answer
    x = 117,012.29

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1.5x scale

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.