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Finding the Fourth Proportional to 93,072, 128,462.12 and 52,809.33

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Solution

The fourth proportional to 93,072, 128,462.12 and 52,809.33 is: 72,889.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,072 : 128,462.12 = 52,809.33 : x
  2. Step 2: Convert to fraction form
    93,072/128,462.12 = 52,809.33/x
  3. Step 3: Cross multiply
    93,072x = 128,462.12 × 52,809.33
  4. Step 4: Simplify right side
    93,072x = 6,783,998,223.53
  5. Step 5: Solve for x
    x = 6,783,998,223.53/93,072
  6. Step 6: Final answer
    x = 72,889.79

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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.