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Finding the Fourth Proportional to 265,855.34, 398,780.95 and 66,174.39

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Solution

The fourth proportional to 265,855.34, 398,780.95 and 66,174.39 is: 99,261.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,855.34 : 398,780.95 = 66,174.39 : x
  2. Step 2: Convert to fraction form
    265,855.34/398,780.95 = 66,174.39/x
  3. Step 3: Cross multiply
    265,855.34x = 398,780.95 × 66,174.39
  4. Step 4: Simplify right side
    265,855.34x = 26,389,086,109.87
  5. Step 5: Solve for x
    x = 26,389,086,109.87/265,855.34
  6. Step 6: Final answer
    x = 99,261.07

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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.