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Finding the Fourth Proportional to 120,614.72, 166,426.80 and 72,836.08

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Solution

The fourth proportional to 120,614.72, 166,426.80 and 72,836.08 is: 100,500.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,614.72 : 166,426.80 = 72,836.08 : x
  2. Step 2: Convert to fraction form
    120,614.72/166,426.80 = 72,836.08/x
  3. Step 3: Cross multiply
    120,614.72x = 166,426.80 × 72,836.08
  4. Step 4: Simplify right side
    120,614.72x = 12,121,875,718.94
  5. Step 5: Solve for x
    x = 12,121,875,718.94/120,614.72
  6. Step 6: Final answer
    x = 100,500.80

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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.