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Finding the Fourth Proportional to 357,991.20, 536,999.76 and 121,356.72

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Solution

The fourth proportional to 357,991.20, 536,999.76 and 121,356.72 is: 182,039.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,991.20 : 536,999.76 = 121,356.72 : x
  2. Step 2: Convert to fraction form
    357,991.20/536,999.76 = 121,356.72/x
  3. Step 3: Cross multiply
    357,991.20x = 536,999.76 × 121,356.72
  4. Step 4: Simplify right side
    357,991.20x = 65,168,529,514.39
  5. Step 5: Solve for x
    x = 65,168,529,514.39/357,991.20
  6. Step 6: Final answer
    x = 182,039.47

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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.