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Finding the Fourth Proportional to 56,722.64, 85,034.73 and 28,619.02

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Solution

The fourth proportional to 56,722.64, 85,034.73 and 28,619.02 is: 42,903.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,722.64 : 85,034.73 = 28,619.02 : x
  2. Step 2: Convert to fraction form
    56,722.64/85,034.73 = 28,619.02/x
  3. Step 3: Cross multiply
    56,722.64x = 85,034.73 × 28,619.02
  4. Step 4: Simplify right side
    56,722.64x = 2,433,610,638.56
  5. Step 5: Solve for x
    x = 2,433,610,638.56/56,722.64
  6. Step 6: Final answer
    x = 42,903.69

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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.