Home / 76,780.04-115,170.03-30,000.11

Finding the Fourth Proportional to 76,780.04, 115,170.03 and 30,000.11

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Solution

The fourth proportional to 76,780.04, 115,170.03 and 30,000.11 is: 45,000.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,780.04 : 115,170.03 = 30,000.11 : x
  2. Step 2: Convert to fraction form
    76,780.04/115,170.03 = 30,000.11/x
  3. Step 3: Cross multiply
    76,780.04x = 115,170.03 × 30,000.11
  4. Step 4: Simplify right side
    76,780.04x = 3,455,112,992.85
  5. Step 5: Solve for x
    x = 3,455,112,992.85/76,780.04
  6. Step 6: Final answer
    x = 45,000.15

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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.