Home / 81,137.09-121,706.10-21,973.28

Finding the Fourth Proportional to 81,137.09, 121,706.10 and 21,973.28

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Solution

The fourth proportional to 81,137.09, 121,706.10 and 21,973.28 is: 32,960.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,137.09 : 121,706.10 = 21,973.28 : x
  2. Step 2: Convert to fraction form
    81,137.09/121,706.10 = 21,973.28/x
  3. Step 3: Cross multiply
    81,137.09x = 121,706.10 × 21,973.28
  4. Step 4: Simplify right side
    81,137.09x = 2,674,281,494.61
  5. Step 5: Solve for x
    x = 2,674,281,494.61/81,137.09
  6. Step 6: Final answer
    x = 32,960.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.