Home / 145,304.43-218,021.31-74,189.49

Finding the Fourth Proportional to 145,304.43, 218,021.31 and 74,189.49

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Solution

The fourth proportional to 145,304.43, 218,021.31 and 74,189.49 is: 111,317.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,304.43 : 218,021.31 = 74,189.49 : x
  2. Step 2: Convert to fraction form
    145,304.43/218,021.31 = 74,189.49/x
  3. Step 3: Cross multiply
    145,304.43x = 218,021.31 × 74,189.49
  4. Step 4: Simplify right side
    145,304.43x = 16,174,889,798.03
  5. Step 5: Solve for x
    x = 16,174,889,798.03/145,304.43
  6. Step 6: Final answer
    x = 111,317.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.