Home / 80,048.09-120,072.14-30,139.38

Finding the Fourth Proportional to 80,048.09, 120,072.14 and 30,139.38

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Solution

The fourth proportional to 80,048.09, 120,072.14 and 30,139.38 is: 45,209.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,048.09 : 120,072.14 = 30,139.38 : x
  2. Step 2: Convert to fraction form
    80,048.09/120,072.14 = 30,139.38/x
  3. Step 3: Cross multiply
    80,048.09x = 120,072.14 × 30,139.38
  4. Step 4: Simplify right side
    80,048.09x = 3,618,900,267.47
  5. Step 5: Solve for x
    x = 3,618,900,267.47/80,048.09
  6. Step 6: Final answer
    x = 45,209.08

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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.