Home / 257,731.92-386,607.60-80,254.44

Finding the Fourth Proportional to 257,731.92, 386,607.60 and 80,254.44

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Solution

The fourth proportional to 257,731.92, 386,607.60 and 80,254.44 is: 120,384.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,731.92 : 386,607.60 = 80,254.44 : x
  2. Step 2: Convert to fraction form
    257,731.92/386,607.60 = 80,254.44/x
  3. Step 3: Cross multiply
    257,731.92x = 386,607.60 × 80,254.44
  4. Step 4: Simplify right side
    257,731.92x = 31,026,976,437.74
  5. Step 5: Solve for x
    x = 31,026,976,437.74/257,731.92
  6. Step 6: Final answer
    x = 120,384.69

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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.