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Finding the Fourth Proportional to 86,556.84, 129,849.84 and 39,808.50

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Solution

The fourth proportional to 86,556.84, 129,849.84 and 39,808.50 is: 59,719.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,556.84 : 129,849.84 = 39,808.50 : x
  2. Step 2: Convert to fraction form
    86,556.84/129,849.84 = 39,808.50/x
  3. Step 3: Cross multiply
    86,556.84x = 129,849.84 × 39,808.50
  4. Step 4: Simplify right side
    86,556.84x = 5,169,127,355.64
  5. Step 5: Solve for x
    x = 5,169,127,355.64/86,556.84
  6. Step 6: Final answer
    x = 59,719.46

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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.