Home / 217,123.86-326,186.37-208,155.90

Finding the Fourth Proportional to 217,123.86, 326,186.37 and 208,155.90

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Solution

The fourth proportional to 217,123.86, 326,186.37 and 208,155.90 is: 312,713.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,123.86 : 326,186.37 = 208,155.90 : x
  2. Step 2: Convert to fraction form
    217,123.86/326,186.37 = 208,155.90/x
  3. Step 3: Cross multiply
    217,123.86x = 326,186.37 × 208,155.90
  4. Step 4: Simplify right side
    217,123.86x = 67,897,617,415.08
  5. Step 5: Solve for x
    x = 67,897,617,415.08/217,123.86
  6. Step 6: Final answer
    x = 312,713.75

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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.