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Finding the Fourth Proportional to 135,628.80, 203,462.40 and 42,124.80

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Solution

The fourth proportional to 135,628.80, 203,462.40 and 42,124.80 is: 63,193.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,628.80 : 203,462.40 = 42,124.80 : x
  2. Step 2: Convert to fraction form
    135,628.80/203,462.40 = 42,124.80/x
  3. Step 3: Cross multiply
    135,628.80x = 203,462.40 × 42,124.80
  4. Step 4: Simplify right side
    135,628.80x = 8,570,812,907.52
  5. Step 5: Solve for x
    x = 8,570,812,907.52/135,628.80
  6. Step 6: Final answer
    x = 63,193.16

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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.