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Finding the Fourth Proportional to 58,678.98, 87,983.30 and 18,680.70

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Solution

The fourth proportional to 58,678.98, 87,983.30 and 18,680.70 is: 28,009.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,678.98 : 87,983.30 = 18,680.70 : x
  2. Step 2: Convert to fraction form
    58,678.98/87,983.30 = 18,680.70/x
  3. Step 3: Cross multiply
    58,678.98x = 87,983.30 × 18,680.70
  4. Step 4: Simplify right side
    58,678.98x = 1,643,589,632.31
  5. Step 5: Solve for x
    x = 1,643,589,632.31/58,678.98
  6. Step 6: Final answer
    x = 28,009.85

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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.