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Finding the Fourth Proportional to 86,402.40, 119,242.40 and 48,679.20

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Solution

The fourth proportional to 86,402.40, 119,242.40 and 48,679.20 is: 67,181.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,402.40 : 119,242.40 = 48,679.20 : x
  2. Step 2: Convert to fraction form
    86,402.40/119,242.40 = 48,679.20/x
  3. Step 3: Cross multiply
    86,402.40x = 119,242.40 × 48,679.20
  4. Step 4: Simplify right side
    86,402.40x = 5,804,624,638.08
  5. Step 5: Solve for x
    x = 5,804,624,638.08/86,402.40
  6. Step 6: Final answer
    x = 67,181.29

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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.