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Finding the Fourth Proportional to 421,158.56, 631,644.82 and 121,574.04

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Solution

The fourth proportional to 421,158.56, 631,644.82 and 121,574.04 is: 182,334.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,158.56 : 631,644.82 = 121,574.04 : x
  2. Step 2: Convert to fraction form
    421,158.56/631,644.82 = 121,574.04/x
  3. Step 3: Cross multiply
    421,158.56x = 631,644.82 × 121,574.04
  4. Step 4: Simplify right side
    421,158.56x = 76,791,612,612.47
  5. Step 5: Solve for x
    x = 76,791,612,612.47/421,158.56
  6. Step 6: Final answer
    x = 182,334.21

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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.