Home / 55,011.15-75,913.20-31,142.78

Finding the Fourth Proportional to 55,011.15, 75,913.20 and 31,142.78

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Solution

The fourth proportional to 55,011.15, 75,913.20 and 31,142.78 is: 42,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,011.15 : 75,913.20 = 31,142.78 : x
  2. Step 2: Convert to fraction form
    55,011.15/75,913.20 = 31,142.78/x
  3. Step 3: Cross multiply
    55,011.15x = 75,913.20 × 31,142.78
  4. Step 4: Simplify right side
    55,011.15x = 2,364,147,991.80
  5. Step 5: Solve for x
    x = 2,364,147,991.80/55,011.15
  6. Step 6: Final answer
    x = 42,975.80

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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.