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Finding the Fourth Proportional to 58,285, 80,389.56 and 40,409.92

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Solution

The fourth proportional to 58,285, 80,389.56 and 40,409.92 is: 55,735.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,285 : 80,389.56 = 40,409.92 : x
  2. Step 2: Convert to fraction form
    58,285/80,389.56 = 40,409.92/x
  3. Step 3: Cross multiply
    58,285x = 80,389.56 × 40,409.92
  4. Step 4: Simplify right side
    58,285x = 3,248,535,688.44
  5. Step 5: Solve for x
    x = 3,248,535,688.44/58,285
  6. Step 6: Final answer
    x = 55,735.36

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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.