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Finding the Fourth Proportional to 93,388.94, 128,876.73 and 55,663.19

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Solution

The fourth proportional to 93,388.94, 128,876.73 and 55,663.19 is: 76,815.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,388.94 : 128,876.73 = 55,663.19 : x
  2. Step 2: Convert to fraction form
    93,388.94/128,876.73 = 55,663.19/x
  3. Step 3: Cross multiply
    93,388.94x = 128,876.73 × 55,663.19
  4. Step 4: Simplify right side
    93,388.94x = 7,173,689,908.57
  5. Step 5: Solve for x
    x = 7,173,689,908.57/93,388.94
  6. Step 6: Final answer
    x = 76,815.20

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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.