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Finding the Fourth Proportional to 135,290.64, 186,674.52 and 74,849.98

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Solution

The fourth proportional to 135,290.64, 186,674.52 and 74,849.98 is: 103,278.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,290.64 : 186,674.52 = 74,849.98 : x
  2. Step 2: Convert to fraction form
    135,290.64/186,674.52 = 74,849.98/x
  3. Step 3: Cross multiply
    135,290.64x = 186,674.52 × 74,849.98
  4. Step 4: Simplify right side
    135,290.64x = 13,972,584,088.51
  5. Step 5: Solve for x
    x = 13,972,584,088.51/135,290.64
  6. Step 6: Final answer
    x = 103,278.28

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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.