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Finding the Fourth Proportional to 52,486.72, 78,659.58 and 28,758.58

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Solution

The fourth proportional to 52,486.72, 78,659.58 and 28,758.58 is: 43,099.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,486.72 : 78,659.58 = 28,758.58 : x
  2. Step 2: Convert to fraction form
    52,486.72/78,659.58 = 28,758.58/x
  3. Step 3: Cross multiply
    52,486.72x = 78,659.58 × 28,758.58
  4. Step 4: Simplify right side
    52,486.72x = 2,262,137,824.20
  5. Step 5: Solve for x
    x = 2,262,137,824.20/52,486.72
  6. Step 6: Final answer
    x = 43,099.24

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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.