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Finding the Fourth Proportional to 135,349.58, 186,782.78 and 74,924.40

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Solution

The fourth proportional to 135,349.58, 186,782.78 and 74,924.40 is: 103,395.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,349.58 : 186,782.78 = 74,924.40 : x
  2. Step 2: Convert to fraction form
    135,349.58/186,782.78 = 74,924.40/x
  3. Step 3: Cross multiply
    135,349.58x = 186,782.78 × 74,924.40
  4. Step 4: Simplify right side
    135,349.58x = 13,994,587,721.83
  5. Step 5: Solve for x
    x = 13,994,587,721.83/135,349.58
  6. Step 6: Final answer
    x = 103,395.87

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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.