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Finding the Fourth Proportional to 156,475.75, 215,934.49 and 84,855.40

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Solution

The fourth proportional to 156,475.75, 215,934.49 and 84,855.40 is: 117,099.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,475.75 : 215,934.49 = 84,855.40 : x
  2. Step 2: Convert to fraction form
    156,475.75/215,934.49 = 84,855.40/x
  3. Step 3: Cross multiply
    156,475.75x = 215,934.49 × 84,855.40
  4. Step 4: Simplify right side
    156,475.75x = 18,323,207,522.75
  5. Step 5: Solve for x
    x = 18,323,207,522.75/156,475.75
  6. Step 6: Final answer
    x = 117,099.34

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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.