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Finding the Fourth Proportional to 57,218.40, 85,827.60 and 48,578.40

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Solution

The fourth proportional to 57,218.40, 85,827.60 and 48,578.40 is: 72,867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,218.40 : 85,827.60 = 48,578.40 : x
  2. Step 2: Convert to fraction form
    57,218.40/85,827.60 = 48,578.40/x
  3. Step 3: Cross multiply
    57,218.40x = 85,827.60 × 48,578.40
  4. Step 4: Simplify right side
    57,218.40x = 4,169,367,483.84
  5. Step 5: Solve for x
    x = 4,169,367,483.84/57,218.40
  6. Step 6: Final answer
    x = 72,867.60

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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.