Home / 257,821.20-386,731.80-108,011.70

Finding the Fourth Proportional to 257,821.20, 386,731.80 and 108,011.70

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Solution

The fourth proportional to 257,821.20, 386,731.80 and 108,011.70 is: 162,017.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,821.20 : 386,731.80 = 108,011.70 : x
  2. Step 2: Convert to fraction form
    257,821.20/386,731.80 = 108,011.70/x
  3. Step 3: Cross multiply
    257,821.20x = 386,731.80 × 108,011.70
  4. Step 4: Simplify right side
    257,821.20x = 41,771,559,162.06
  5. Step 5: Solve for x
    x = 41,771,559,162.06/257,821.20
  6. Step 6: Final answer
    x = 162,017.55

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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.