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Finding the Fourth Proportional to 135,763.20, 203,644.80 and 72,777.60

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Solution

The fourth proportional to 135,763.20, 203,644.80 and 72,777.60 is: 109,166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,763.20 : 203,644.80 = 72,777.60 : x
  2. Step 2: Convert to fraction form
    135,763.20/203,644.80 = 72,777.60/x
  3. Step 3: Cross multiply
    135,763.20x = 203,644.80 × 72,777.60
  4. Step 4: Simplify right side
    135,763.20x = 14,820,779,796.48
  5. Step 5: Solve for x
    x = 14,820,779,796.48/135,763.20
  6. Step 6: Final answer
    x = 109,166.40

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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.