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Finding the Fourth Proportional to 201,878.60, 302,817.90 and 89,515.40

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Solution

The fourth proportional to 201,878.60, 302,817.90 and 89,515.40 is: 134,273.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,878.60 : 302,817.90 = 89,515.40 : x
  2. Step 2: Convert to fraction form
    201,878.60/302,817.90 = 89,515.40/x
  3. Step 3: Cross multiply
    201,878.60x = 302,817.90 × 89,515.40
  4. Step 4: Simplify right side
    201,878.60x = 27,106,865,445.66
  5. Step 5: Solve for x
    x = 27,106,865,445.66/201,878.60
  6. Step 6: Final answer
    x = 134,273.10

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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.