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Finding the Fourth Proportional to 156,937.62, 216,571.36 and 85,319.43

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Solution

The fourth proportional to 156,937.62, 216,571.36 and 85,319.43 is: 117,739.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,937.62 : 216,571.36 = 85,319.43 : x
  2. Step 2: Convert to fraction form
    156,937.62/216,571.36 = 85,319.43/x
  3. Step 3: Cross multiply
    156,937.62x = 216,571.36 × 85,319.43
  4. Step 4: Simplify right side
    156,937.62x = 18,477,744,989.52
  5. Step 5: Solve for x
    x = 18,477,744,989.52/156,937.62
  6. Step 6: Final answer
    x = 117,739.42

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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.