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Finding the Fourth Proportional to 86,649.96, 129,958.56 and 42,232.08

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Solution

The fourth proportional to 86,649.96, 129,958.56 and 42,232.08 is: 63,340.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,649.96 : 129,958.56 = 42,232.08 : x
  2. Step 2: Convert to fraction form
    86,649.96/129,958.56 = 42,232.08/x
  3. Step 3: Cross multiply
    86,649.96x = 129,958.56 × 42,232.08
  4. Step 4: Simplify right side
    86,649.96x = 5,488,420,302.60
  5. Step 5: Solve for x
    x = 5,488,420,302.60/86,649.96
  6. Step 6: Final answer
    x = 63,340.14

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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.