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Finding the Fourth Proportional to 93,879, 129,553.02 and 51,439.05

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Solution

The fourth proportional to 93,879, 129,553.02 and 51,439.05 is: 70,985.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,879 : 129,553.02 = 51,439.05 : x
  2. Step 2: Convert to fraction form
    93,879/129,553.02 = 51,439.05/x
  3. Step 3: Cross multiply
    93,879x = 129,553.02 × 51,439.05
  4. Step 4: Simplify right side
    93,879x = 6,664,084,273.43
  5. Step 5: Solve for x
    x = 6,664,084,273.43/93,879
  6. Step 6: Final answer
    x = 70,985.89

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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.