Home / 77,000.20-115,500.30-72,334.60

Finding the Fourth Proportional to 77,000.20, 115,500.30 and 72,334.60

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Solution

The fourth proportional to 77,000.20, 115,500.30 and 72,334.60 is: 108,501.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,000.20 : 115,500.30 = 72,334.60 : x
  2. Step 2: Convert to fraction form
    77,000.20/115,500.30 = 72,334.60/x
  3. Step 3: Cross multiply
    77,000.20x = 115,500.30 × 72,334.60
  4. Step 4: Simplify right side
    77,000.20x = 8,354,668,000.38
  5. Step 5: Solve for x
    x = 8,354,668,000.38/77,000.20
  6. Step 6: Final answer
    x = 108,501.90

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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.