Home / 201,621.90-302,432.85-138,636.30

Finding the Fourth Proportional to 201,621.90, 302,432.85 and 138,636.30

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Solution

The fourth proportional to 201,621.90, 302,432.85 and 138,636.30 is: 207,954.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,621.90 : 302,432.85 = 138,636.30 : x
  2. Step 2: Convert to fraction form
    201,621.90/302,432.85 = 138,636.30/x
  3. Step 3: Cross multiply
    201,621.90x = 302,432.85 × 138,636.30
  4. Step 4: Simplify right side
    201,621.90x = 41,928,171,322.46
  5. Step 5: Solve for x
    x = 41,928,171,322.46/201,621.90
  6. Step 6: Final answer
    x = 207,954.45

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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.