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Finding the Fourth Proportional to 86,208.53, 129,307.42 and 41,261.81

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Solution

The fourth proportional to 86,208.53, 129,307.42 and 41,261.81 is: 61,890.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,208.53 : 129,307.42 = 41,261.81 : x
  2. Step 2: Convert to fraction form
    86,208.53/129,307.42 = 41,261.81/x
  3. Step 3: Cross multiply
    86,208.53x = 129,307.42 × 41,261.81
  4. Step 4: Simplify right side
    86,208.53x = 5,335,458,195.63
  5. Step 5: Solve for x
    x = 5,335,458,195.63/86,208.53
  6. Step 6: Final answer
    x = 61,890.14

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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.