Home / 217,890.10-326,835.15-138,769.30

Finding the Fourth Proportional to 217,890.10, 326,835.15 and 138,769.30

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Solution

The fourth proportional to 217,890.10, 326,835.15 and 138,769.30 is: 208,153.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,890.10 : 326,835.15 = 138,769.30 : x
  2. Step 2: Convert to fraction form
    217,890.10/326,835.15 = 138,769.30/x
  3. Step 3: Cross multiply
    217,890.10x = 326,835.15 × 138,769.30
  4. Step 4: Simplify right side
    217,890.10x = 45,354,684,980.90
  5. Step 5: Solve for x
    x = 45,354,684,980.90/217,890.10
  6. Step 6: Final answer
    x = 208,153.95

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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.