Home / 217,890.60-326,835.90-138,769.80

Finding the Fourth Proportional to 217,890.60, 326,835.90 and 138,769.80

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Solution

The fourth proportional to 217,890.60, 326,835.90 and 138,769.80 is: 208,154.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,890.60 : 326,835.90 = 138,769.80 : x
  2. Step 2: Convert to fraction form
    217,890.60/326,835.90 = 138,769.80/x
  3. Step 3: Cross multiply
    217,890.60x = 326,835.90 × 138,769.80
  4. Step 4: Simplify right side
    217,890.60x = 45,354,952,475.82
  5. Step 5: Solve for x
    x = 45,354,952,475.82/217,890.60
  6. Step 6: Final answer
    x = 208,154.70

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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.