Home / 206,756.50-285,432.34-139,129.06

Finding the Fourth Proportional to 206,756.50, 285,432.34 and 139,129.06

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Solution

The fourth proportional to 206,756.50, 285,432.34 and 139,129.06 is: 192,071.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,756.50 : 285,432.34 = 139,129.06 : x
  2. Step 2: Convert to fraction form
    206,756.50/285,432.34 = 139,129.06/x
  3. Step 3: Cross multiply
    206,756.50x = 285,432.34 × 139,129.06
  4. Step 4: Simplify right side
    206,756.50x = 39,711,932,096.40
  5. Step 5: Solve for x
    x = 39,711,932,096.40/206,756.50
  6. Step 6: Final answer
    x = 192,071.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.