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Finding the Fourth Proportional to 86,808.78, 119,788.88 and 80,461.62

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Solution

The fourth proportional to 86,808.78, 119,788.88 and 80,461.62 is: 111,030.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,808.78 : 119,788.88 = 80,461.62 : x
  2. Step 2: Convert to fraction form
    86,808.78/119,788.88 = 80,461.62/x
  3. Step 3: Cross multiply
    86,808.78x = 119,788.88 × 80,461.62
  4. Step 4: Simplify right side
    86,808.78x = 9,638,406,940.48
  5. Step 5: Solve for x
    x = 9,638,406,940.48/86,808.78
  6. Step 6: Final answer
    x = 111,030.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.