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Finding the Fourth Proportional to 72,669.08, 109,002.54 and 20,077.40

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Solution

The fourth proportional to 72,669.08, 109,002.54 and 20,077.40 is: 30,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,669.08 : 109,002.54 = 20,077.40 : x
  2. Step 2: Convert to fraction form
    72,669.08/109,002.54 = 20,077.40/x
  3. Step 3: Cross multiply
    72,669.08x = 109,002.54 × 20,077.40
  4. Step 4: Simplify right side
    72,669.08x = 2,188,487,596.60
  5. Step 5: Solve for x
    x = 2,188,487,596.60/72,669.08
  6. Step 6: Final answer
    x = 30,115.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.