Home / 215,834.64-298,039.85-135,400.43

Finding the Fourth Proportional to 215,834.64, 298,039.85 and 135,400.43

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Solution

The fourth proportional to 215,834.64, 298,039.85 and 135,400.43 is: 186,970.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,834.64 : 298,039.85 = 135,400.43 : x
  2. Step 2: Convert to fraction form
    215,834.64/298,039.85 = 135,400.43/x
  3. Step 3: Cross multiply
    215,834.64x = 298,039.85 × 135,400.43
  4. Step 4: Simplify right side
    215,834.64x = 40,354,721,679.93
  5. Step 5: Solve for x
    x = 40,354,721,679.93/215,834.64
  6. Step 6: Final answer
    x = 186,970.55

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1.5x scale

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.