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Finding the Fourth Proportional to 139,727.48, 208,640.80 and 131,834.24

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Solution

The fourth proportional to 139,727.48, 208,640.80 and 131,834.24 is: 196,854.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,727.48 : 208,640.80 = 131,834.24 : x
  2. Step 2: Convert to fraction form
    139,727.48/208,640.80 = 131,834.24/x
  3. Step 3: Cross multiply
    139,727.48x = 208,640.80 × 131,834.24
  4. Step 4: Simplify right side
    139,727.48x = 27,506,001,300.99
  5. Step 5: Solve for x
    x = 27,506,001,300.99/139,727.48
  6. Step 6: Final answer
    x = 196,854.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.