Home / 120,644.28-166,493.55-72,888.38

Finding the Fourth Proportional to 120,644.28, 166,493.55 and 72,888.38

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Solution

The fourth proportional to 120,644.28, 166,493.55 and 72,888.38 is: 100,588.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,644.28 : 166,493.55 = 72,888.38 : x
  2. Step 2: Convert to fraction form
    120,644.28/166,493.55 = 72,888.38/x
  3. Step 3: Cross multiply
    120,644.28x = 166,493.55 × 72,888.38
  4. Step 4: Simplify right side
    120,644.28x = 12,135,444,307.48
  5. Step 5: Solve for x
    x = 12,135,444,307.48/120,644.28
  6. Step 6: Final answer
    x = 100,588.64

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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.