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Finding the Fourth Proportional to 84,814.30, 127,221.45 and 42,823.90

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Solution

The fourth proportional to 84,814.30, 127,221.45 and 42,823.90 is: 64,235.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,814.30 : 127,221.45 = 42,823.90 : x
  2. Step 2: Convert to fraction form
    84,814.30/127,221.45 = 42,823.90/x
  3. Step 3: Cross multiply
    84,814.30x = 127,221.45 × 42,823.90
  4. Step 4: Simplify right side
    84,814.30x = 5,448,118,652.66
  5. Step 5: Solve for x
    x = 5,448,118,652.66/84,814.30
  6. Step 6: Final answer
    x = 64,235.85

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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.