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Finding the Fourth Proportional to 135,644.80, 203,486.40 and 42,140.80

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Solution

The fourth proportional to 135,644.80, 203,486.40 and 42,140.80 is: 63,217.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,644.80 : 203,486.40 = 42,140.80 : x
  2. Step 2: Convert to fraction form
    135,644.80/203,486.40 = 42,140.80/x
  3. Step 3: Cross multiply
    135,644.80x = 203,486.40 × 42,140.80
  4. Step 4: Simplify right side
    135,644.80x = 8,575,079,685.12
  5. Step 5: Solve for x
    x = 8,575,079,685.12/135,644.80
  6. Step 6: Final answer
    x = 63,217.16

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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.