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Finding the Fourth Proportional to 55,131.40, 76,080.92 and 29,980.88

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Solution

The fourth proportional to 55,131.40, 76,080.92 and 29,980.88 is: 41,373.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,131.40 : 76,080.92 = 29,980.88 : x
  2. Step 2: Convert to fraction form
    55,131.40/76,080.92 = 29,980.88/x
  3. Step 3: Cross multiply
    55,131.40x = 76,080.92 × 29,980.88
  4. Step 4: Simplify right side
    55,131.40x = 2,280,972,932.81
  5. Step 5: Solve for x
    x = 2,280,972,932.81/55,131.40
  6. Step 6: Final answer
    x = 41,373.39

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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.