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Finding the Fourth Proportional to 58,662.72, 87,944.64 and 39,890.16

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Solution

The fourth proportional to 58,662.72, 87,944.64 and 39,890.16 is: 59,801.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,662.72 : 87,944.64 = 39,890.16 : x
  2. Step 2: Convert to fraction form
    58,662.72/87,944.64 = 39,890.16/x
  3. Step 3: Cross multiply
    58,662.72x = 87,944.64 × 39,890.16
  4. Step 4: Simplify right side
    58,662.72x = 3,508,125,760.74
  5. Step 5: Solve for x
    x = 3,508,125,760.74/58,662.72
  6. Step 6: Final answer
    x = 59,801.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.