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Finding the Fourth Proportional to 57,403.80, 79,217.94 and 31,911.72

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Solution

The fourth proportional to 57,403.80, 79,217.94 and 31,911.72 is: 44,038.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,403.80 : 79,217.94 = 31,911.72 : x
  2. Step 2: Convert to fraction form
    57,403.80/79,217.94 = 31,911.72/x
  3. Step 3: Cross multiply
    57,403.80x = 79,217.94 × 31,911.72
  4. Step 4: Simplify right side
    57,403.80x = 2,527,980,720.26
  5. Step 5: Solve for x
    x = 2,527,980,720.26/57,403.80
  6. Step 6: Final answer
    x = 44,038.56

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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.