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Finding the Fourth Proportional to 201,878.10, 302,819.55 and 86,457.03

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Solution

The fourth proportional to 201,878.10, 302,819.55 and 86,457.03 is: 129,686.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,878.10 : 302,819.55 = 86,457.03 : x
  2. Step 2: Convert to fraction form
    201,878.10/302,819.55 = 86,457.03/x
  3. Step 3: Cross multiply
    201,878.10x = 302,819.55 × 86,457.03
  4. Step 4: Simplify right side
    201,878.10x = 26,180,878,918.94
  5. Step 5: Solve for x
    x = 26,180,878,918.94/201,878.10
  6. Step 6: Final answer
    x = 129,686.57

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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.