Home / 87,891.47-121,256.76-64,976.31

Finding the Fourth Proportional to 87,891.47, 121,256.76 and 64,976.31

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Solution

The fourth proportional to 87,891.47, 121,256.76 and 64,976.31 is: 89,642.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,891.47 : 121,256.76 = 64,976.31 : x
  2. Step 2: Convert to fraction form
    87,891.47/121,256.76 = 64,976.31/x
  3. Step 3: Cross multiply
    87,891.47x = 121,256.76 × 64,976.31
  4. Step 4: Simplify right side
    87,891.47x = 7,878,816,827.36
  5. Step 5: Solve for x
    x = 7,878,816,827.36/87,891.47
  6. Step 6: Final answer
    x = 89,642.57

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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.