Home / 120,916.88-166,885.92-77,884.16

Finding the Fourth Proportional to 120,916.88, 166,885.92 and 77,884.16

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Solution

The fourth proportional to 120,916.88, 166,885.92 and 77,884.16 is: 107,493.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,916.88 : 166,885.92 = 77,884.16 : x
  2. Step 2: Convert to fraction form
    120,916.88/166,885.92 = 77,884.16/x
  3. Step 3: Cross multiply
    120,916.88x = 166,885.92 × 77,884.16
  4. Step 4: Simplify right side
    120,916.88x = 12,997,769,695.03
  5. Step 5: Solve for x
    x = 12,997,769,695.03/120,916.88
  6. Step 6: Final answer
    x = 107,493.43

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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.