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Finding the Fourth Proportional to 105,911.88, 146,130.48 and 62,880

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Solution

The fourth proportional to 105,911.88, 146,130.48 and 62,880 is: 86,757.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,911.88 : 146,130.48 = 62,880 : x
  2. Step 2: Convert to fraction form
    105,911.88/146,130.48 = 62,880/x
  3. Step 3: Cross multiply
    105,911.88x = 146,130.48 × 62,880
  4. Step 4: Simplify right side
    105,911.88x = 9,188,684,582.40
  5. Step 5: Solve for x
    x = 9,188,684,582.40/105,911.88
  6. Step 6: Final answer
    x = 86,757.83

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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.