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Finding the Fourth Proportional to 93,960, 129,725.28 and 83,871.18

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Solution

The fourth proportional to 93,960, 129,725.28 and 83,871.18 is: 115,796.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,960 : 129,725.28 = 83,871.18 : x
  2. Step 2: Convert to fraction form
    93,960/129,725.28 = 83,871.18/x
  3. Step 3: Cross multiply
    93,960x = 129,725.28 × 83,871.18
  4. Step 4: Simplify right side
    93,960x = 10,880,212,309.43
  5. Step 5: Solve for x
    x = 10,880,212,309.43/93,960
  6. Step 6: Final answer
    x = 115,796.21

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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.