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Finding the Fourth Proportional to 421,157.56, 631,643.32 and 121,573.04

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Solution

The fourth proportional to 421,157.56, 631,643.32 and 121,573.04 is: 182,332.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,157.56 : 631,643.32 = 121,573.04 : x
  2. Step 2: Convert to fraction form
    421,157.56/631,643.32 = 121,573.04/x
  3. Step 3: Cross multiply
    421,157.56x = 631,643.32 × 121,573.04
  4. Step 4: Simplify right side
    421,157.56x = 76,790,798,608.09
  5. Step 5: Solve for x
    x = 76,790,798,608.09/421,157.56
  6. Step 6: Final answer
    x = 182,332.71

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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.