Home / 56,419.85-77,855.80-30,921.71

Finding the Fourth Proportional to 56,419.85, 77,855.80 and 30,921.71

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Solution

The fourth proportional to 56,419.85, 77,855.80 and 30,921.71 is: 42,669.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,419.85 : 77,855.80 = 30,921.71 : x
  2. Step 2: Convert to fraction form
    56,419.85/77,855.80 = 30,921.71/x
  3. Step 3: Cross multiply
    56,419.85x = 77,855.80 × 30,921.71
  4. Step 4: Simplify right side
    56,419.85x = 2,407,434,469.42
  5. Step 5: Solve for x
    x = 2,407,434,469.42/56,419.85
  6. Step 6: Final answer
    x = 42,669.99

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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.