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Finding the Fourth Proportional to 114,340.79, 171,478.78 and 72,157.68

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Solution

The fourth proportional to 114,340.79, 171,478.78 and 72,157.68 is: 108,216.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,340.79 : 171,478.78 = 72,157.68 : x
  2. Step 2: Convert to fraction form
    114,340.79/171,478.78 = 72,157.68/x
  3. Step 3: Cross multiply
    114,340.79x = 171,478.78 × 72,157.68
  4. Step 4: Simplify right side
    114,340.79x = 12,373,510,753.64
  5. Step 5: Solve for x
    x = 12,373,510,753.64/114,340.79
  6. Step 6: Final answer
    x = 108,216.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.