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Finding the Fourth Proportional to 76,139.80, 114,209.70 and 36,700.90

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Solution

The fourth proportional to 76,139.80, 114,209.70 and 36,700.90 is: 55,051.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,139.80 : 114,209.70 = 36,700.90 : x
  2. Step 2: Convert to fraction form
    76,139.80/114,209.70 = 36,700.90/x
  3. Step 3: Cross multiply
    76,139.80x = 114,209.70 × 36,700.90
  4. Step 4: Simplify right side
    76,139.80x = 4,191,598,778.73
  5. Step 5: Solve for x
    x = 4,191,598,778.73/76,139.80
  6. Step 6: Final answer
    x = 55,051.35

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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.