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Finding the Fourth Proportional to 86,722.56, 119,688.12 and 48,996

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Solution

The fourth proportional to 86,722.56, 119,688.12 and 48,996 is: 67,620.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,722.56 : 119,688.12 = 48,996 : x
  2. Step 2: Convert to fraction form
    86,722.56/119,688.12 = 48,996/x
  3. Step 3: Cross multiply
    86,722.56x = 119,688.12 × 48,996
  4. Step 4: Simplify right side
    86,722.56x = 5,864,239,127.52
  5. Step 5: Solve for x
    x = 5,864,239,127.52/86,722.56
  6. Step 6: Final answer
    x = 67,620.69

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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.