Home / 389,385.90-584,139.60-123,121.08

Finding the Fourth Proportional to 389,385.90, 584,139.60 and 123,121.08

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Solution

The fourth proportional to 389,385.90, 584,139.60 and 123,121.08 is: 184,700.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,385.90 : 584,139.60 = 123,121.08 : x
  2. Step 2: Convert to fraction form
    389,385.90/584,139.60 = 123,121.08/x
  3. Step 3: Cross multiply
    389,385.90x = 584,139.60 × 123,121.08
  4. Step 4: Simplify right side
    389,385.90x = 71,919,898,422.77
  5. Step 5: Solve for x
    x = 71,919,898,422.77/389,385.90
  6. Step 6: Final answer
    x = 184,700.83

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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.