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Finding the Fourth Proportional to 260,037.60, 390,069.20 and 135,621.60

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Solution

The fourth proportional to 260,037.60, 390,069.20 and 135,621.60 is: 203,439.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,037.60 : 390,069.20 = 135,621.60 : x
  2. Step 2: Convert to fraction form
    260,037.60/390,069.20 = 135,621.60/x
  3. Step 3: Cross multiply
    260,037.60x = 390,069.20 × 135,621.60
  4. Step 4: Simplify right side
    260,037.60x = 52,901,809,014.72
  5. Step 5: Solve for x
    x = 52,901,809,014.72/260,037.60
  6. Step 6: Final answer
    x = 203,439.08

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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.