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Finding the Fourth Proportional to 86,679.30, 129,796.95 and 59,988.32

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Solution

The fourth proportional to 86,679.30, 129,796.95 and 59,988.32 is: 89,828.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,679.30 : 129,796.95 = 59,988.32 : x
  2. Step 2: Convert to fraction form
    86,679.30/129,796.95 = 59,988.32/x
  3. Step 3: Cross multiply
    86,679.30x = 129,796.95 × 59,988.32
  4. Step 4: Simplify right side
    86,679.30x = 7,786,300,971.62
  5. Step 5: Solve for x
    x = 7,786,300,971.62/86,679.30
  6. Step 6: Final answer
    x = 89,828.84

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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.