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Finding the Fourth Proportional to 105,612.76, 145,722.92 and 62,605.80

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Solution

The fourth proportional to 105,612.76, 145,722.92 and 62,605.80 is: 86,382.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,612.76 : 145,722.92 = 62,605.80 : x
  2. Step 2: Convert to fraction form
    105,612.76/145,722.92 = 62,605.80/x
  3. Step 3: Cross multiply
    105,612.76x = 145,722.92 × 62,605.80
  4. Step 4: Simplify right side
    105,612.76x = 9,123,099,984.94
  5. Step 5: Solve for x
    x = 9,123,099,984.94/105,612.76
  6. Step 6: Final answer
    x = 86,382.55

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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.