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Finding the Fourth Proportional to 132,978.05, 183,484.60 and 79,268.08

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Solution

The fourth proportional to 132,978.05, 183,484.60 and 79,268.08 is: 109,374.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,978.05 : 183,484.60 = 79,268.08 : x
  2. Step 2: Convert to fraction form
    132,978.05/183,484.60 = 79,268.08/x
  3. Step 3: Cross multiply
    132,978.05x = 183,484.60 × 79,268.08
  4. Step 4: Simplify right side
    132,978.05x = 14,544,471,951.57
  5. Step 5: Solve for x
    x = 14,544,471,951.57/132,978.05
  6. Step 6: Final answer
    x = 109,374.98

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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.