Home / 55,089.18-76,021.62-31,218.12

Finding the Fourth Proportional to 55,089.18, 76,021.62 and 31,218.12

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Solution

The fourth proportional to 55,089.18, 76,021.62 and 31,218.12 is: 43,080.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,089.18 : 76,021.62 = 31,218.12 : x
  2. Step 2: Convert to fraction form
    55,089.18/76,021.62 = 31,218.12/x
  3. Step 3: Cross multiply
    55,089.18x = 76,021.62 × 31,218.12
  4. Step 4: Simplify right side
    55,089.18x = 2,373,252,055.75
  5. Step 5: Solve for x
    x = 2,373,252,055.75/55,089.18
  6. Step 6: Final answer
    x = 43,080.18

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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.