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Finding the Fourth Proportional to 201,709.40, 302,531.70 and 61,435.40

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Solution

The fourth proportional to 201,709.40, 302,531.70 and 61,435.40 is: 92,143.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,709.40 : 302,531.70 = 61,435.40 : x
  2. Step 2: Convert to fraction form
    201,709.40/302,531.70 = 61,435.40/x
  3. Step 3: Cross multiply
    201,709.40x = 302,531.70 × 61,435.40
  4. Step 4: Simplify right side
    201,709.40x = 18,586,156,002.18
  5. Step 5: Solve for x
    x = 18,586,156,002.18/201,709.40
  6. Step 6: Final answer
    x = 92,143.23

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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.