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Finding the Fourth Proportional to 135,397.64, 186,859.25 and 74,973.90

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Solution

The fourth proportional to 135,397.64, 186,859.25 and 74,973.90 is: 103,469.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,397.64 : 186,859.25 = 74,973.90 : x
  2. Step 2: Convert to fraction form
    135,397.64/186,859.25 = 74,973.90/x
  3. Step 3: Cross multiply
    135,397.64x = 186,859.25 × 74,973.90
  4. Step 4: Simplify right side
    135,397.64x = 14,009,566,911.01
  5. Step 5: Solve for x
    x = 14,009,566,911.01/135,397.64
  6. Step 6: Final answer
    x = 103,469.81

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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.