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Finding the Fourth Proportional to 81,130.98, 111,874.75 and 55,674.47

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Solution

The fourth proportional to 81,130.98, 111,874.75 and 55,674.47 is: 76,771.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,130.98 : 111,874.75 = 55,674.47 : x
  2. Step 2: Convert to fraction form
    81,130.98/111,874.75 = 55,674.47/x
  3. Step 3: Cross multiply
    81,130.98x = 111,874.75 × 55,674.47
  4. Step 4: Simplify right side
    81,130.98x = 6,228,566,853.26
  5. Step 5: Solve for x
    x = 6,228,566,853.26/81,130.98
  6. Step 6: Final answer
    x = 76,771.74

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1.5x scale

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.