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Finding the Fourth Proportional to 93,431.60, 128,937.48 and 50,991.92

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Solution

The fourth proportional to 93,431.60, 128,937.48 and 50,991.92 is: 70,369.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,431.60 : 128,937.48 = 50,991.92 : x
  2. Step 2: Convert to fraction form
    93,431.60/128,937.48 = 50,991.92/x
  3. Step 3: Cross multiply
    93,431.60x = 128,937.48 × 50,991.92
  4. Step 4: Simplify right side
    93,431.60x = 6,574,769,665.16
  5. Step 5: Solve for x
    x = 6,574,769,665.16/93,431.60
  6. Step 6: Final answer
    x = 70,369.87

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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.