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Finding the Fourth Proportional to 76,758.80, 115,130.18 and 20,604.92

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Solution

The fourth proportional to 76,758.80, 115,130.18 and 20,604.92 is: 30,905.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,758.80 : 115,130.18 = 20,604.92 : x
  2. Step 2: Convert to fraction form
    76,758.80/115,130.18 = 20,604.92/x
  3. Step 3: Cross multiply
    76,758.80x = 115,130.18 × 20,604.92
  4. Step 4: Simplify right side
    76,758.80x = 2,372,248,148.49
  5. Step 5: Solve for x
    x = 2,372,248,148.49/76,758.80
  6. Step 6: Final answer
    x = 30,905.23

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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.