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Finding the Fourth Proportional to 72,660.42, 108,569.87 and 55,700.64

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Solution

The fourth proportional to 72,660.42, 108,569.87 and 55,700.64 is: 83,228.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,660.42 : 108,569.87 = 55,700.64 : x
  2. Step 2: Convert to fraction form
    72,660.42/108,569.87 = 55,700.64/x
  3. Step 3: Cross multiply
    72,660.42x = 108,569.87 × 55,700.64
  4. Step 4: Simplify right side
    72,660.42x = 6,047,410,965.21
  5. Step 5: Solve for x
    x = 6,047,410,965.21/72,660.42
  6. Step 6: Final answer
    x = 83,228.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.