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Finding the Fourth Proportional to 330,437.31, 495,656.45 and 81,119.31

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Solution

The fourth proportional to 330,437.31, 495,656.45 and 81,119.31 is: 121,679.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,437.31 : 495,656.45 = 81,119.31 : x
  2. Step 2: Convert to fraction form
    330,437.31/495,656.45 = 81,119.31/x
  3. Step 3: Cross multiply
    330,437.31x = 495,656.45 × 81,119.31
  4. Step 4: Simplify right side
    330,437.31x = 40,207,308,815.45
  5. Step 5: Solve for x
    x = 40,207,308,815.45/330,437.31
  6. Step 6: Final answer
    x = 121,679.08

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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.