Home / 217,845.40-300,700.20-137,407

Finding the Fourth Proportional to 217,845.40, 300,700.20 and 137,407

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Solution

The fourth proportional to 217,845.40, 300,700.20 and 137,407 is: 189,668.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,845.40 : 300,700.20 = 137,407 : x
  2. Step 2: Convert to fraction form
    217,845.40/300,700.20 = 137,407/x
  3. Step 3: Cross multiply
    217,845.40x = 300,700.20 × 137,407
  4. Step 4: Simplify right side
    217,845.40x = 41,318,312,381.40
  5. Step 5: Solve for x
    x = 41,318,312,381.40/217,845.40
  6. Step 6: Final answer
    x = 189,668.05

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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.