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Finding the Fourth Proportional to 57,920.64, 79,931.52 and 32,775.36

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Solution

The fourth proportional to 57,920.64, 79,931.52 and 32,775.36 is: 45,230.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,920.64 : 79,931.52 = 32,775.36 : x
  2. Step 2: Convert to fraction form
    57,920.64/79,931.52 = 32,775.36/x
  3. Step 3: Cross multiply
    57,920.64x = 79,931.52 × 32,775.36
  4. Step 4: Simplify right side
    57,920.64x = 2,619,784,343.35
  5. Step 5: Solve for x
    x = 2,619,784,343.35/57,920.64
  6. Step 6: Final answer
    x = 45,230.58

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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.