Home / 257,698.11-386,583.63-80,223.06

Finding the Fourth Proportional to 257,698.11, 386,583.63 and 80,223.06

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Solution

The fourth proportional to 257,698.11, 386,583.63 and 80,223.06 is: 120,345.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,698.11 : 386,583.63 = 80,223.06 : x
  2. Step 2: Convert to fraction form
    257,698.11/386,583.63 = 80,223.06/x
  3. Step 3: Cross multiply
    257,698.11x = 386,583.63 × 80,223.06
  4. Step 4: Simplify right side
    257,698.11x = 31,012,921,744.51
  5. Step 5: Solve for x
    x = 31,012,921,744.51/257,698.11
  6. Step 6: Final answer
    x = 120,345.94

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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.