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Finding the Fourth Proportional to 58,015.20, 87,029.20 and 18,565.60

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Solution

The fourth proportional to 58,015.20, 87,029.20 and 18,565.60 is: 27,850.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,015.20 : 87,029.20 = 18,565.60 : x
  2. Step 2: Convert to fraction form
    58,015.20/87,029.20 = 18,565.60/x
  3. Step 3: Cross multiply
    58,015.20x = 87,029.20 × 18,565.60
  4. Step 4: Simplify right side
    58,015.20x = 1,615,749,315.52
  5. Step 5: Solve for x
    x = 1,615,749,315.52/58,015.20
  6. Step 6: Final answer
    x = 27,850.45

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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.