Home / 74,120.65-102,286.56-40,129.16

Finding the Fourth Proportional to 74,120.65, 102,286.56 and 40,129.16

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Solution

The fourth proportional to 74,120.65, 102,286.56 and 40,129.16 is: 55,378.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,120.65 : 102,286.56 = 40,129.16 : x
  2. Step 2: Convert to fraction form
    74,120.65/102,286.56 = 40,129.16/x
  3. Step 3: Cross multiply
    74,120.65x = 102,286.56 × 40,129.16
  4. Step 4: Simplify right side
    74,120.65x = 4,104,673,987.81
  5. Step 5: Solve for x
    x = 4,104,673,987.81/74,120.65
  6. Step 6: Final answer
    x = 55,378.28

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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.