Home / 153,122.85-211,309.20-85,137.66

Finding the Fourth Proportional to 153,122.85, 211,309.20 and 85,137.66

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Solution

The fourth proportional to 153,122.85, 211,309.20 and 85,137.66 is: 117,489.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,122.85 : 211,309.20 = 85,137.66 : x
  2. Step 2: Convert to fraction form
    153,122.85/211,309.20 = 85,137.66/x
  3. Step 3: Cross multiply
    153,122.85x = 211,309.20 × 85,137.66
  4. Step 4: Simplify right side
    153,122.85x = 17,990,370,824.47
  5. Step 5: Solve for x
    x = 17,990,370,824.47/153,122.85
  6. Step 6: Final answer
    x = 117,489.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.