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Finding the Fourth Proportional to 63,212.40, 87,285.60 and 42,087.60

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Solution

The fourth proportional to 63,212.40, 87,285.60 and 42,087.60 is: 58,115.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,212.40 : 87,285.60 = 42,087.60 : x
  2. Step 2: Convert to fraction form
    63,212.40/87,285.60 = 42,087.60/x
  3. Step 3: Cross multiply
    63,212.40x = 87,285.60 × 42,087.60
  4. Step 4: Simplify right side
    63,212.40x = 3,673,641,418.56
  5. Step 5: Solve for x
    x = 3,673,641,418.56/63,212.40
  6. Step 6: Final answer
    x = 58,115.84

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1.5x scale

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.