Home / 77,157.95-115,725.20-21,002.42

Finding the Fourth Proportional to 77,157.95, 115,725.20 and 21,002.42

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Solution

The fourth proportional to 77,157.95, 115,725.20 and 21,002.42 is: 31,500.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,157.95 : 115,725.20 = 21,002.42 : x
  2. Step 2: Convert to fraction form
    77,157.95/115,725.20 = 21,002.42/x
  3. Step 3: Cross multiply
    77,157.95x = 115,725.20 × 21,002.42
  4. Step 4: Simplify right side
    77,157.95x = 2,430,508,571.35
  5. Step 5: Solve for x
    x = 2,430,508,571.35/77,157.95
  6. Step 6: Final answer
    x = 31,500.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.