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Finding the Fourth Proportional to 90,855, 136,193.96 and 43,457.72

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Solution

The fourth proportional to 90,855, 136,193.96 and 43,457.72 is: 65,144.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,855 : 136,193.96 = 43,457.72 : x
  2. Step 2: Convert to fraction form
    90,855/136,193.96 = 43,457.72/x
  3. Step 3: Cross multiply
    90,855x = 136,193.96 × 43,457.72
  4. Step 4: Simplify right side
    90,855x = 5,918,678,081.11
  5. Step 5: Solve for x
    x = 5,918,678,081.11/90,855
  6. Step 6: Final answer
    x = 65,144.22

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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.