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Finding the Fourth Proportional to 93,431.32, 128,951.94 and 55,708

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Solution

The fourth proportional to 93,431.32, 128,951.94 and 55,708 is: 76,887.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,431.32 : 128,951.94 = 55,708 : x
  2. Step 2: Convert to fraction form
    93,431.32/128,951.94 = 55,708/x
  3. Step 3: Cross multiply
    93,431.32x = 128,951.94 × 55,708
  4. Step 4: Simplify right side
    93,431.32x = 7,183,654,673.52
  5. Step 5: Solve for x
    x = 7,183,654,673.52/93,431.32
  6. Step 6: Final answer
    x = 76,887.01

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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.