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Finding the Fourth Proportional to 156,937.37, 216,571 and 85,319.20

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Solution

The fourth proportional to 156,937.37, 216,571 and 85,319.20 is: 117,739.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,937.37 : 216,571 = 85,319.20 : x
  2. Step 2: Convert to fraction form
    156,937.37/216,571 = 85,319.20/x
  3. Step 3: Cross multiply
    156,937.37x = 216,571 × 85,319.20
  4. Step 4: Simplify right side
    156,937.37x = 18,477,664,463.20
  5. Step 5: Solve for x
    x = 18,477,664,463.20/156,937.37
  6. Step 6: Final answer
    x = 117,739.10

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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.