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Finding the Fourth Proportional to 217,503.08, 300,153.76 and 120,721.76

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Solution

The fourth proportional to 217,503.08, 300,153.76 and 120,721.76 is: 166,595.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,503.08 : 300,153.76 = 120,721.76 : x
  2. Step 2: Convert to fraction form
    217,503.08/300,153.76 = 120,721.76/x
  3. Step 3: Cross multiply
    217,503.08x = 300,153.76 × 120,721.76
  4. Step 4: Simplify right side
    217,503.08x = 36,235,090,177.82
  5. Step 5: Solve for x
    x = 36,235,090,177.82/217,503.08
  6. Step 6: Final answer
    x = 166,595.76

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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.