Home / 205,455.90-307,989.45-121,280.70

Finding the Fourth Proportional to 205,455.90, 307,989.45 and 121,280.70

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Solution

The fourth proportional to 205,455.90, 307,989.45 and 121,280.70 is: 181,806.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,455.90 : 307,989.45 = 121,280.70 : x
  2. Step 2: Convert to fraction form
    205,455.90/307,989.45 = 121,280.70/x
  3. Step 3: Cross multiply
    205,455.90x = 307,989.45 × 121,280.70
  4. Step 4: Simplify right side
    205,455.90x = 37,353,176,088.62
  5. Step 5: Solve for x
    x = 37,353,176,088.62/205,455.90
  6. Step 6: Final answer
    x = 181,806.30

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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.