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Finding the Fourth Proportional to 108,421.40, 162,656.40 and 41,855.60

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Solution

The fourth proportional to 108,421.40, 162,656.40 and 41,855.60 is: 62,792.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,421.40 : 162,656.40 = 41,855.60 : x
  2. Step 2: Convert to fraction form
    108,421.40/162,656.40 = 41,855.60/x
  3. Step 3: Cross multiply
    108,421.40x = 162,656.40 × 41,855.60
  4. Step 4: Simplify right side
    108,421.40x = 6,808,081,215.84
  5. Step 5: Solve for x
    x = 6,808,081,215.84/108,421.40
  6. Step 6: Final answer
    x = 62,792.78

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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.