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Finding the Fourth Proportional to 137,799.91, 206,507.40 and 74,483.56

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Solution

The fourth proportional to 137,799.91, 206,507.40 and 74,483.56 is: 111,621.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,799.91 : 206,507.40 = 74,483.56 : x
  2. Step 2: Convert to fraction form
    137,799.91/206,507.40 = 74,483.56/x
  3. Step 3: Cross multiply
    137,799.91x = 206,507.40 × 74,483.56
  4. Step 4: Simplify right side
    137,799.91x = 15,381,406,318.34
  5. Step 5: Solve for x
    x = 15,381,406,318.34/137,799.91
  6. Step 6: Final answer
    x = 111,621.31

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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.