Home / 259,621.60-389,140.80-109,836.40

Finding the Fourth Proportional to 259,621.60, 389,140.80 and 109,836.40

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Solution

The fourth proportional to 259,621.60, 389,140.80 and 109,836.40 is: 164,631.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,621.60 : 389,140.80 = 109,836.40 : x
  2. Step 2: Convert to fraction form
    259,621.60/389,140.80 = 109,836.40/x
  3. Step 3: Cross multiply
    259,621.60x = 389,140.80 × 109,836.40
  4. Step 4: Simplify right side
    259,621.60x = 42,741,824,565.12
  5. Step 5: Solve for x
    x = 42,741,824,565.12/259,621.60
  6. Step 6: Final answer
    x = 164,631.23

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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.