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Finding the Fourth Proportional to 86,003.67, 129,013.65 and 33,417.21

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Solution

The fourth proportional to 86,003.67, 129,013.65 and 33,417.21 is: 50,128.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,003.67 : 129,013.65 = 33,417.21 : x
  2. Step 2: Convert to fraction form
    86,003.67/129,013.65 = 33,417.21/x
  3. Step 3: Cross multiply
    86,003.67x = 129,013.65 × 33,417.21
  4. Step 4: Simplify right side
    86,003.67x = 4,311,276,234.92
  5. Step 5: Solve for x
    x = 4,311,276,234.92/86,003.67
  6. Step 6: Final answer
    x = 50,128.98

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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.