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Finding the Fourth Proportional to 139,523.56, 209,320.45 and 39,683.77

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Solution

The fourth proportional to 139,523.56, 209,320.45 and 39,683.77 is: 59,535.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,523.56 : 209,320.45 = 39,683.77 : x
  2. Step 2: Convert to fraction form
    139,523.56/209,320.45 = 39,683.77/x
  3. Step 3: Cross multiply
    139,523.56x = 209,320.45 × 39,683.77
  4. Step 4: Simplify right side
    139,523.56x = 8,306,625,372.23
  5. Step 5: Solve for x
    x = 8,306,625,372.23/139,523.56
  6. Step 6: Final answer
    x = 59,535.65

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1.5x scale

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.