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Finding the Fourth Proportional to 93,468.51, 128,982.05 and 53,178.51

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Solution

The fourth proportional to 93,468.51, 128,982.05 and 53,178.51 is: 73,383.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,468.51 : 128,982.05 = 53,178.51 : x
  2. Step 2: Convert to fraction form
    93,468.51/128,982.05 = 53,178.51/x
  3. Step 3: Cross multiply
    93,468.51x = 128,982.05 × 53,178.51
  4. Step 4: Simplify right side
    93,468.51x = 6,859,072,969.85
  5. Step 5: Solve for x
    x = 6,859,072,969.85/93,468.51
  6. Step 6: Final answer
    x = 73,383.78

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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.