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Finding the Fourth Proportional to 86,907.92, 119,931.88 and 49,181.20

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Solution

The fourth proportional to 86,907.92, 119,931.88 and 49,181.20 is: 67,869.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,907.92 : 119,931.88 = 49,181.20 : x
  2. Step 2: Convert to fraction form
    86,907.92/119,931.88 = 49,181.20/x
  3. Step 3: Cross multiply
    86,907.92x = 119,931.88 × 49,181.20
  4. Step 4: Simplify right side
    86,907.92x = 5,898,393,776.66
  5. Step 5: Solve for x
    x = 5,898,393,776.66/86,907.92
  6. Step 6: Final answer
    x = 67,869.46

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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.