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Finding the Fourth Proportional to 86,638.88, 119,550.80 and 48,389.28

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Solution

The fourth proportional to 86,638.88, 119,550.80 and 48,389.28 is: 66,771.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,638.88 : 119,550.80 = 48,389.28 : x
  2. Step 2: Convert to fraction form
    86,638.88/119,550.80 = 48,389.28/x
  3. Step 3: Cross multiply
    86,638.88x = 119,550.80 × 48,389.28
  4. Step 4: Simplify right side
    86,638.88x = 5,784,977,135.42
  5. Step 5: Solve for x
    x = 5,784,977,135.42/86,638.88
  6. Step 6: Final answer
    x = 66,771.14

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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.