Home / 132,721.80-183,142.80-81,726.36

Finding the Fourth Proportional to 132,721.80, 183,142.80 and 81,726.36

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Solution

The fourth proportional to 132,721.80, 183,142.80 and 81,726.36 is: 112,774.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,721.80 : 183,142.80 = 81,726.36 : x
  2. Step 2: Convert to fraction form
    132,721.80/183,142.80 = 81,726.36/x
  3. Step 3: Cross multiply
    132,721.80x = 183,142.80 × 81,726.36
  4. Step 4: Simplify right side
    132,721.80x = 14,967,594,404.21
  5. Step 5: Solve for x
    x = 14,967,594,404.21/132,721.80
  6. Step 6: Final answer
    x = 112,774.20

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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.