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Finding the Fourth Proportional to 57,751.70, 86,627.55 and 42,005.30

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Solution

The fourth proportional to 57,751.70, 86,627.55 and 42,005.30 is: 63,007.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,751.70 : 86,627.55 = 42,005.30 : x
  2. Step 2: Convert to fraction form
    57,751.70/86,627.55 = 42,005.30/x
  3. Step 3: Cross multiply
    57,751.70x = 86,627.55 × 42,005.30
  4. Step 4: Simplify right side
    57,751.70x = 3,638,816,226.02
  5. Step 5: Solve for x
    x = 3,638,816,226.02/57,751.70
  6. Step 6: Final answer
    x = 63,007.95

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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.