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Finding the Fourth Proportional to 57,878.40, 86,817.60 and 50,005.20

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Solution

The fourth proportional to 57,878.40, 86,817.60 and 50,005.20 is: 75,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,878.40 : 86,817.60 = 50,005.20 : x
  2. Step 2: Convert to fraction form
    57,878.40/86,817.60 = 50,005.20/x
  3. Step 3: Cross multiply
    57,878.40x = 86,817.60 × 50,005.20
  4. Step 4: Simplify right side
    57,878.40x = 4,341,331,451.52
  5. Step 5: Solve for x
    x = 4,341,331,451.52/57,878.40
  6. Step 6: Final answer
    x = 75,007.80

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1.5x scale

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.