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Finding the Fourth Proportional to 56,751.48, 85,077.88 and 28,648.12

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Solution

The fourth proportional to 56,751.48, 85,077.88 and 28,648.12 is: 42,947.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,751.48 : 85,077.88 = 28,648.12 : x
  2. Step 2: Convert to fraction form
    56,751.48/85,077.88 = 28,648.12/x
  3. Step 3: Cross multiply
    56,751.48x = 85,077.88 × 28,648.12
  4. Step 4: Simplify right side
    56,751.48x = 2,437,321,315.59
  5. Step 5: Solve for x
    x = 2,437,321,315.59/56,751.48
  6. Step 6: Final answer
    x = 42,947.27

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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.