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Finding the Fourth Proportional to 156,315, 215,713.44 and 84,694.80

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Solution

The fourth proportional to 156,315, 215,713.44 and 84,694.80 is: 116,878.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,315 : 215,713.44 = 84,694.80 : x
  2. Step 2: Convert to fraction form
    156,315/215,713.44 = 84,694.80/x
  3. Step 3: Cross multiply
    156,315x = 215,713.44 × 84,694.80
  4. Step 4: Simplify right side
    156,315x = 18,269,806,658.11
  5. Step 5: Solve for x
    x = 18,269,806,658.11/156,315
  6. Step 6: Final answer
    x = 116,878.14

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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.