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Finding the Fourth Proportional to 78,690.64, 108,566.41 and 48,052.56

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Solution

The fourth proportional to 78,690.64, 108,566.41 and 48,052.56 is: 66,296.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,690.64 : 108,566.41 = 48,052.56 : x
  2. Step 2: Convert to fraction form
    78,690.64/108,566.41 = 48,052.56/x
  3. Step 3: Cross multiply
    78,690.64x = 108,566.41 × 48,052.56
  4. Step 4: Simplify right side
    78,690.64x = 5,216,893,930.51
  5. Step 5: Solve for x
    x = 5,216,893,930.51/78,690.64
  6. Step 6: Final answer
    x = 66,296.24

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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.