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Finding the Fourth Proportional to 265,030.88, 397,508.80 and 85,131.96

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Solution

The fourth proportional to 265,030.88, 397,508.80 and 85,131.96 is: 127,685.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,030.88 : 397,508.80 = 85,131.96 : x
  2. Step 2: Convert to fraction form
    265,030.88/397,508.80 = 85,131.96/x
  3. Step 3: Cross multiply
    265,030.88x = 397,508.80 × 85,131.96
  4. Step 4: Simplify right side
    265,030.88x = 33,840,703,261.25
  5. Step 5: Solve for x
    x = 33,840,703,261.25/265,030.88
  6. Step 6: Final answer
    x = 127,685.89

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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.