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Finding the Fourth Proportional to 135,362.09, 186,801.32 and 74,938.32

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Solution

The fourth proportional to 135,362.09, 186,801.32 and 74,938.32 is: 103,415.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,362.09 : 186,801.32 = 74,938.32 : x
  2. Step 2: Convert to fraction form
    135,362.09/186,801.32 = 74,938.32/x
  3. Step 3: Cross multiply
    135,362.09x = 186,801.32 × 74,938.32
  4. Step 4: Simplify right side
    135,362.09x = 13,998,577,281.93
  5. Step 5: Solve for x
    x = 13,998,577,281.93/135,362.09
  6. Step 6: Final answer
    x = 103,415.79

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1.5x scale

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.