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Finding the Fourth Proportional to 84,814.10, 127,221.15 and 71,692.10

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Solution

The fourth proportional to 84,814.10, 127,221.15 and 71,692.10 is: 107,538.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,814.10 : 127,221.15 = 71,692.10 : x
  2. Step 2: Convert to fraction form
    84,814.10/127,221.15 = 71,692.10/x
  3. Step 3: Cross multiply
    84,814.10x = 127,221.15 × 71,692.10
  4. Step 4: Simplify right side
    84,814.10x = 9,120,751,407.92
  5. Step 5: Solve for x
    x = 9,120,751,407.92/84,814.10
  6. Step 6: Final answer
    x = 107,538.15

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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.