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Finding the Fourth Proportional to 58,186.48, 87,305.64 and 30,478

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Solution

The fourth proportional to 58,186.48, 87,305.64 and 30,478 is: 45,730.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,186.48 : 87,305.64 = 30,478 : x
  2. Step 2: Convert to fraction form
    58,186.48/87,305.64 = 30,478/x
  3. Step 3: Cross multiply
    58,186.48x = 87,305.64 × 30,478
  4. Step 4: Simplify right side
    58,186.48x = 2,660,901,295.92
  5. Step 5: Solve for x
    x = 2,660,901,295.92/58,186.48
  6. Step 6: Final answer
    x = 45,730.58

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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.