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Finding the Fourth Proportional to 93,162.78, 128,565.09 and 50,721.60

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Solution

The fourth proportional to 93,162.78, 128,565.09 and 50,721.60 is: 69,996.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,162.78 : 128,565.09 = 50,721.60 : x
  2. Step 2: Convert to fraction form
    93,162.78/128,565.09 = 50,721.60/x
  3. Step 3: Cross multiply
    93,162.78x = 128,565.09 × 50,721.60
  4. Step 4: Simplify right side
    93,162.78x = 6,521,027,068.94
  5. Step 5: Solve for x
    x = 6,521,027,068.94/93,162.78
  6. Step 6: Final answer
    x = 69,996.05

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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.