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Finding the Fourth Proportional to 217,788.48, 300,417.75 and 137,075.88

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Solution

The fourth proportional to 217,788.48, 300,417.75 and 137,075.88 is: 189,082.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,788.48 : 300,417.75 = 137,075.88 : x
  2. Step 2: Convert to fraction form
    217,788.48/300,417.75 = 137,075.88/x
  3. Step 3: Cross multiply
    217,788.48x = 300,417.75 × 137,075.88
  4. Step 4: Simplify right side
    217,788.48x = 41,180,027,448.87
  5. Step 5: Solve for x
    x = 41,180,027,448.87/217,788.48
  6. Step 6: Final answer
    x = 189,082.67

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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.