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Finding the Fourth Proportional to 201,656.45, 302,530.19 and 66,720.21

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Solution

The fourth proportional to 201,656.45, 302,530.19 and 66,720.21 is: 100,095.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,656.45 : 302,530.19 = 66,720.21 : x
  2. Step 2: Convert to fraction form
    201,656.45/302,530.19 = 66,720.21/x
  3. Step 3: Cross multiply
    201,656.45x = 302,530.19 × 66,720.21
  4. Step 4: Simplify right side
    201,656.45x = 20,184,877,474.54
  5. Step 5: Solve for x
    x = 20,184,877,474.54/201,656.45
  6. Step 6: Final answer
    x = 100,095.37

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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.