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Finding the Fourth Proportional to 93,961, 129,726.66 and 83,872.18

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Solution

The fourth proportional to 93,961, 129,726.66 and 83,872.18 is: 115,797.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,961 : 129,726.66 = 83,872.18 : x
  2. Step 2: Convert to fraction form
    93,961/129,726.66 = 83,872.18/x
  3. Step 3: Cross multiply
    93,961x = 129,726.66 × 83,872.18
  4. Step 4: Simplify right side
    93,961x = 10,880,457,778.32
  5. Step 5: Solve for x
    x = 10,880,457,778.32/93,961
  6. Step 6: Final answer
    x = 115,797.59

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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.