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Finding the Fourth Proportional to 55,079.70, 82,619.40 and 15,636.90

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Solution

The fourth proportional to 55,079.70, 82,619.40 and 15,636.90 is: 23,455.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,079.70 : 82,619.40 = 15,636.90 : x
  2. Step 2: Convert to fraction form
    55,079.70/82,619.40 = 15,636.90/x
  3. Step 3: Cross multiply
    55,079.70x = 82,619.40 × 15,636.90
  4. Step 4: Simplify right side
    55,079.70x = 1,291,911,295.86
  5. Step 5: Solve for x
    x = 1,291,911,295.86/55,079.70
  6. Step 6: Final answer
    x = 23,455.31

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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.