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Finding the Fourth Proportional to 84,312.96, 126,469.44 and 28,909.44

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Solution

The fourth proportional to 84,312.96, 126,469.44 and 28,909.44 is: 43,364.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,312.96 : 126,469.44 = 28,909.44 : x
  2. Step 2: Convert to fraction form
    84,312.96/126,469.44 = 28,909.44/x
  3. Step 3: Cross multiply
    84,312.96x = 126,469.44 × 28,909.44
  4. Step 4: Simplify right side
    84,312.96x = 3,656,160,687.51
  5. Step 5: Solve for x
    x = 3,656,160,687.51/84,312.96
  6. Step 6: Final answer
    x = 43,364.16

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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.