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Finding the Fourth Proportional to 57,480.26, 79,315.85 and 31,980.14

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Solution

The fourth proportional to 57,480.26, 79,315.85 and 31,980.14 is: 44,128.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,480.26 : 79,315.85 = 31,980.14 : x
  2. Step 2: Convert to fraction form
    57,480.26/79,315.85 = 31,980.14/x
  3. Step 3: Cross multiply
    57,480.26x = 79,315.85 × 31,980.14
  4. Step 4: Simplify right side
    57,480.26x = 2,536,531,430.74
  5. Step 5: Solve for x
    x = 2,536,531,430.74/57,480.26
  6. Step 6: Final answer
    x = 44,128.74

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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.