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Finding the Fourth Proportional to 86,402.72, 129,416.54 and 41,936.02

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Solution

The fourth proportional to 86,402.72, 129,416.54 and 41,936.02 is: 62,813.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,402.72 : 129,416.54 = 41,936.02 : x
  2. Step 2: Convert to fraction form
    86,402.72/129,416.54 = 41,936.02/x
  3. Step 3: Cross multiply
    86,402.72x = 129,416.54 × 41,936.02
  4. Step 4: Simplify right side
    86,402.72x = 5,427,214,609.77
  5. Step 5: Solve for x
    x = 5,427,214,609.77/86,402.72
  6. Step 6: Final answer
    x = 62,813.01

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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.