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Finding the Fourth Proportional to 104,239.82, 143,859.80 and 87,214.03

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Solution

The fourth proportional to 104,239.82, 143,859.80 and 87,214.03 is: 120,362.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,239.82 : 143,859.80 = 87,214.03 : x
  2. Step 2: Convert to fraction form
    104,239.82/143,859.80 = 87,214.03/x
  3. Step 3: Cross multiply
    104,239.82x = 143,859.80 × 87,214.03
  4. Step 4: Simplify right side
    104,239.82x = 12,546,592,771.38
  5. Step 5: Solve for x
    x = 12,546,592,771.38/104,239.82
  6. Step 6: Final answer
    x = 120,362.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.