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Finding the Fourth Proportional to 78,393.39, 108,227.75 and 51,613.74

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Solution

The fourth proportional to 78,393.39, 108,227.75 and 51,613.74 is: 71,256.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,393.39 : 108,227.75 = 51,613.74 : x
  2. Step 2: Convert to fraction form
    78,393.39/108,227.75 = 51,613.74/x
  3. Step 3: Cross multiply
    78,393.39x = 108,227.75 × 51,613.74
  4. Step 4: Simplify right side
    78,393.39x = 5,586,038,691.22
  5. Step 5: Solve for x
    x = 5,586,038,691.22/78,393.39
  6. Step 6: Final answer
    x = 71,256.50

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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.