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Finding the Fourth Proportional to 79,085.75, 109,138.21 and 43,275.74

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Solution

The fourth proportional to 79,085.75, 109,138.21 and 43,275.74 is: 59,720.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,085.75 : 109,138.21 = 43,275.74 : x
  2. Step 2: Convert to fraction form
    79,085.75/109,138.21 = 43,275.74/x
  3. Step 3: Cross multiply
    79,085.75x = 109,138.21 × 43,275.74
  4. Step 4: Simplify right side
    79,085.75x = 4,723,036,146.15
  5. Step 5: Solve for x
    x = 4,723,036,146.15/79,085.75
  6. Step 6: Final answer
    x = 59,720.45

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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.