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Finding the Fourth Proportional to 86,391.90, 119,224.50 and 48,151.50

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Solution

The fourth proportional to 86,391.90, 119,224.50 and 48,151.50 is: 66,451.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,391.90 : 119,224.50 = 48,151.50 : x
  2. Step 2: Convert to fraction form
    86,391.90/119,224.50 = 48,151.50/x
  3. Step 3: Cross multiply
    86,391.90x = 119,224.50 × 48,151.50
  4. Step 4: Simplify right side
    86,391.90x = 5,740,838,511.75
  5. Step 5: Solve for x
    x = 5,740,838,511.75/86,391.90
  6. Step 6: Final answer
    x = 66,451.12

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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.