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Finding the Fourth Proportional to 78,520.34, 108,393.45 and 51,676.94

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Solution

The fourth proportional to 78,520.34, 108,393.45 and 51,676.94 is: 71,337.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,520.34 : 108,393.45 = 51,676.94 : x
  2. Step 2: Convert to fraction form
    78,520.34/108,393.45 = 51,676.94/x
  3. Step 3: Cross multiply
    78,520.34x = 108,393.45 × 51,676.94
  4. Step 4: Simplify right side
    78,520.34x = 5,601,441,812.04
  5. Step 5: Solve for x
    x = 5,601,441,812.04/78,520.34
  6. Step 6: Final answer
    x = 71,337.46

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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.