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Finding the Fourth Proportional to 135,328.04, 186,751.32 and 74,898.80

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Solution

The fourth proportional to 135,328.04, 186,751.32 and 74,898.80 is: 103,359.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,328.04 : 186,751.32 = 74,898.80 : x
  2. Step 2: Convert to fraction form
    135,328.04/186,751.32 = 74,898.80/x
  3. Step 3: Cross multiply
    135,328.04x = 186,751.32 × 74,898.80
  4. Step 4: Simplify right side
    135,328.04x = 13,987,449,766.42
  5. Step 5: Solve for x
    x = 13,987,449,766.42/135,328.04
  6. Step 6: Final answer
    x = 103,359.58

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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.