Home / 206,089.24-309,159.78-72,938.20

Finding the Fourth Proportional to 206,089.24, 309,159.78 and 72,938.20

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Solution

The fourth proportional to 206,089.24, 309,159.78 and 72,938.20 is: 109,416.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,089.24 : 309,159.78 = 72,938.20 : x
  2. Step 2: Convert to fraction form
    206,089.24/309,159.78 = 72,938.20/x
  3. Step 3: Cross multiply
    206,089.24x = 309,159.78 × 72,938.20
  4. Step 4: Simplify right side
    206,089.24x = 22,549,557,865.60
  5. Step 5: Solve for x
    x = 22,549,557,865.60/206,089.24
  6. Step 6: Final answer
    x = 109,416.47

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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.