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Finding the Fourth Proportional to 93,458.92, 128,971.64 and 53,171.81

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Solution

The fourth proportional to 93,458.92, 128,971.64 and 53,171.81 is: 73,376.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,458.92 : 128,971.64 = 53,171.81 : x
  2. Step 2: Convert to fraction form
    93,458.92/128,971.64 = 53,171.81/x
  3. Step 3: Cross multiply
    93,458.92x = 128,971.64 × 53,171.81
  4. Step 4: Simplify right side
    93,458.92x = 6,857,655,537.47
  5. Step 5: Solve for x
    x = 6,857,655,537.47/93,458.92
  6. Step 6: Final answer
    x = 73,376.15

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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.