Home / 99,341.21-137,141.64-76,629.21

Finding the Fourth Proportional to 99,341.21, 137,141.64 and 76,629.21

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Solution

The fourth proportional to 99,341.21, 137,141.64 and 76,629.21 is: 105,787.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,341.21 : 137,141.64 = 76,629.21 : x
  2. Step 2: Convert to fraction form
    99,341.21/137,141.64 = 76,629.21/x
  3. Step 3: Cross multiply
    99,341.21x = 137,141.64 × 76,629.21
  4. Step 4: Simplify right side
    99,341.21x = 10,509,055,531.30
  5. Step 5: Solve for x
    x = 10,509,055,531.30/99,341.21
  6. Step 6: Final answer
    x = 105,787.48

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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.