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Finding the Fourth Proportional to 93,171.84, 128,629.92 and 61,433.28

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Solution

The fourth proportional to 93,171.84, 128,629.92 and 61,433.28 is: 84,812.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,171.84 : 128,629.92 = 61,433.28 : x
  2. Step 2: Convert to fraction form
    93,171.84/128,629.92 = 61,433.28/x
  3. Step 3: Cross multiply
    93,171.84x = 128,629.92 × 61,433.28
  4. Step 4: Simplify right side
    93,171.84x = 7,902,157,891.74
  5. Step 5: Solve for x
    x = 7,902,157,891.74/93,171.84
  6. Step 6: Final answer
    x = 84,812.73

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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.