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Finding the Fourth Proportional to 421,374.22, 632,079.78 and 121,885.07

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Solution

The fourth proportional to 421,374.22, 632,079.78 and 121,885.07 is: 182,832.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,374.22 : 632,079.78 = 121,885.07 : x
  2. Step 2: Convert to fraction form
    421,374.22/632,079.78 = 121,885.07/x
  3. Step 3: Cross multiply
    421,374.22x = 632,079.78 × 121,885.07
  4. Step 4: Simplify right side
    421,374.22x = 77,041,088,230.88
  5. Step 5: Solve for x
    x = 77,041,088,230.88/421,374.22
  6. Step 6: Final answer
    x = 182,832.94

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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.