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Finding the Fourth Proportional to 156,674.55, 216,213.49 and 85,054.57

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Solution

The fourth proportional to 156,674.55, 216,213.49 and 85,054.57 is: 117,376.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,674.55 : 216,213.49 = 85,054.57 : x
  2. Step 2: Convert to fraction form
    156,674.55/216,213.49 = 85,054.57/x
  3. Step 3: Cross multiply
    156,674.55x = 216,213.49 × 85,054.57
  4. Step 4: Simplify right side
    156,674.55x = 18,389,944,454.34
  5. Step 5: Solve for x
    x = 18,389,944,454.34/156,674.55
  6. Step 6: Final answer
    x = 117,376.72

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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.